diff --git a/doc/Usage.md b/doc/Usage.md
index 787c79fe..5967e253 100644
--- a/doc/Usage.md
+++ b/doc/Usage.md
@@ -228,11 +228,22 @@ foreach ($pages as $page) {
     if (!isset($details['MediaBox'])) {
         $pages = $pdf->getObjectsByType('Pages');
         $details = reset($pages)->getHeader()->getDetails();
+        if (!isset($details['MediaBox'])) {
+            $objects = $page->getXObjects();
+            if (isset($objects[0])) {
+                $details = $objects[0]->getHeader()->getDetails();
+                if (isset($details['BBox'])) {
+                    $details['MediaBox'] = $details['BBox'];
+                }
+            }
+        }
+    }
+    if (isset($details['MediaBox'])) {
+        $mediaBox[] = [
+            'width' => $details['MediaBox'][2],
+            'height' => $details['MediaBox'][3]
+        ];
     }
-    $mediaBox[] = [
-        'width' => $details['MediaBox'][2],
-        'height' => $details['MediaBox'][3]
-    ];
 }
 ```
 
diff --git a/samples/bugs/Issue427.pdf b/samples/bugs/Issue427.pdf
new file mode 100644
index 00000000..15e04e97
Binary files /dev/null and b/samples/bugs/Issue427.pdf differ
diff --git a/tests/PHPUnit/Integration/PageTest.php b/tests/PHPUnit/Integration/PageTest.php
index 33751e59..93b76f1d 100644
--- a/tests/PHPUnit/Integration/PageTest.php
+++ b/tests/PHPUnit/Integration/PageTest.php
@@ -41,6 +41,7 @@
 use Smalot\PdfParser\Element\ElementMissing;
 use Smalot\PdfParser\Font;
 use Smalot\PdfParser\Page;
+use TypeError;
 
 class PageTest extends TestCase
 {
@@ -905,6 +906,42 @@ public function testIssue629WithDataTmFontInfo(): void
         $this->assertEquals('F2', $dataTm[0][2]);
     }
 
+    public function testIssue427GetPageDimensions(): void
+    {
+        $filename = $this->rootDir.'/samples/bugs/Issue427.pdf';
+        $parser = $this->getParserInstance();
+        $document = $parser->parseFile($filename);
+        $pages = $document->getPages();
+        $notFound = 0;
+        foreach ($pages as $page) {
+            $details = $page->getDetails();
+            if (!isset($details['MediaBox'])) {
+                $fallbackPages = $document->getObjectsByType('Pages');
+                $details = reset($fallbackPages)->getHeader()->getDetails();
+                if (!isset($details['MediaBox'])) {
+                    try {
+                        $objects = $page->getXObjects();
+                        if (isset($objects[0])) {
+                            $details = $objects[0]->getHeader()->getDetails();
+                            if (isset($details['BBox'])) {
+                                $this->assertArrayHasKey('BBox', $details);
+                                $this->assertArrayHasKey(2, $details['BBox']);
+                                $this->assertArrayHasKey(3, $details['BBox']);
+                                continue;
+                            }
+                        }
+                        $notFound++;
+                        continue;
+                    } catch (TypeError $e) {
+                        $notFound++;
+                        continue;
+                    }
+                }
+            }
+        }
+        $this->assertEquals(count($pages) - 1, $notFound);
+    }
+
     /**
      * Data TM font info is NOT included.
      *