Issue Summary

Using android's Confluence app, when trying to open a pdf file through the attachment macro list, it will fail to open the file with an error message.

Steps to Reproduce

1. Create a page and add an attachment macro
2. attach a pdf file
3. publish the page
4. Access the page with Android's mobile app
5. Try to open the file

Expected Results

The file should be downloaded/ opened on Android

Actual Results

It tries to open the file but fails with the following error:
"Cannot display PDF (filename.pdf is of invalid format)

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available