I think the problem is going to come from the fact that files are not webpages... they don't have Javascript, they don't have cookies, etc...
Adobe's "file" tracking is generally limited to "downloads", which is essentially when a user clicks on a link with a file format (in this case ".ppt") and it tracks it similar to a "exit" link (but as a download rather than an exit....
However, SharePoint has a lot of different ways to download a file, and they aren't limited to clicking on a link... there are actual controls like "download the file" which don't actually have the file reference in something Adobe can read natively.... plus, this doesn't get you views on the file.
One thing you could try (and I can't guarantee this will work the way you expect cause I've literally never tried it), but you could create something like a no-js image request and embed it in the file (basically it's a 1x1 white pixel) (similar to what you would add to a newsletter that can't have Javascript on it)... but there are some risks:
1. I don't know if you can have a pixel per slide, or if all images would "load" as soon as the file is opened
2. If the user is offline, even if the tracking works in normal situations, offline views would be lost
3. Because there are no cookies, UVs and Vs would be inflated
This is certainly an interesting challenge, but not one that I have ever had to deal with before... Good Luck.
