diff --git a/scoap3/articles/tasks.py b/scoap3/articles/tasks.py
index faa14566..097011ac 100644
--- a/scoap3/articles/tasks.py
+++ b/scoap3/articles/tasks.py
@@ -163,15 +163,14 @@ def check_contains_funded_by_scoap3(article):
             return False, "No files found for the given article."
 
         for article_file in article_files:
-            file_path = article_file.file.path
             try:
-                if is_string_in_pdf(file_path, "Funded by SCOAP3"):
+                if is_string_in_pdf(article_file, "Funded by SCOAP3"):
                     return (
                         True,
-                        f"Files contain the required text: 'Funded by SCOAP3'. File: {file_path}",
+                        f"Files contain the required text: 'Funded by SCOAP3'. File: {article_file.file.path}",
                     )
             except FileNotFoundError:
-                return False, f"File not found: {file_path}"
+                return False, f"File not found: {article_file.file.path}"
 
         return False, "Files do not contain the required text: 'Funded by SCOAP3'"
     except Exception as e:
diff --git a/scoap3/articles/util.py b/scoap3/articles/util.py
index d0f2cb64..703e5738 100644
--- a/scoap3/articles/util.py
+++ b/scoap3/articles/util.py
@@ -29,9 +29,10 @@ def parse_string_to_date_object(date_string):
     return datetime.fromisoformat(date_string.replace("Z", "+00:00"))
 
 
-def is_string_in_pdf(pdf_path, search_string):
+def is_string_in_pdf(article_file, search_string):
     try:
-        document = fitz.open(pdf_path)
+        pdf_file = article_file.file.read()
+        document = fitz.open(stream=pdf_file)
         search_string_lower = search_string.lower()
 
         for page_num in range(document.page_count):
@@ -44,6 +45,6 @@ def is_string_in_pdf(pdf_path, search_string):
         document.close()
         return False
     except FileNotFoundError:
-        raise FileNotFoundError(f"File not found: {pdf_path}")
+        raise FileNotFoundError(f"File not found: {article_file}")
     except Exception as e:
         raise Exception(f"An error occurred while reading the PDF: {str(e)}")