Allowing pdf files inside branching scenario

Hey,

I am working on a program to turn a decision tree into a branching scenario h5p file.
That same input also comes with approprate media files to go with the individual nodes.

The issue I am facing is that a lot of those media files I very much want to show, are PDF.
As branching scinario does not allow pdf to be in the image directory of the content file, I am having to skip all pdf files.

Is there anyway to sneak in PDF type files inside a h5p file?

I do not wantthem to be in presentation slide or image slide per se. 
Being able to have these extra media files as pop-ups would be fantastic.

Thank you,
Fahim