Steps to reproduce

1. Attach a .TIF file to a Confluence page;
2. Save the page;
3. Preview the file;

Expected behavior

Confluence previews the original image.

Actual behavior

In the top left corner, the text says

Evaluation Only. Created with Aspose.Pdf. Copyright 2002-2015 Aspose Pty Ltd.

and in the middle of the image, it says "Aspose.Pdf".

It only happens with previews, thumbnails don't show any text.
Downloading the file doesn't carry over the "watermarks" as well.