diff --git a/prowler/providers/aws/lib/s3/s3.py b/prowler/providers/aws/lib/s3/s3.py
index 6ebb711f..f94d7c63 100644
--- a/prowler/providers/aws/lib/s3/s3.py
+++ b/prowler/providers/aws/lib/s3/s3.py
@@ -36,7 +36,14 @@ def send_to_s3_bucket(
         object_name = bucket_directory + "/" + output_mode + "/" + filename
 
         s3_client = audit_session.client("s3")
-        s3_client.upload_file(file_name, output_bucket_name, object_name)
+
+        extra_args = {}
+        if filename.endswith('.html'):
+            extra_args['ContentType'] = 'text/html'
+        elif filename.endswith('.pdf'):
+            extra_args['ContentType'] = 'application/pdf'
+
+        s3_client.upload_file(file_name, output_bucket_name, object_name, ExtraArgs=extra_args)
 
     except Exception as error:
         logger.error(
@@ -49,4 +56,4 @@ def get_s3_object_path(output_directory: str) -> str:
     if "prowler/" in bucket_remote_dir:  # Check if it is not a custom directory
         bucket_remote_dir = bucket_remote_dir.partition("prowler/")[-1]
 
-    return bucket_remote_dir
+    return bucket_remote_dir
\ No newline at end of file