Embed PDFs using Adobe View can't open dynamic URL (no filename in URL)

I am trying to preview PDF from CDN that uses dynamic URLs to generate PDF, like this:

cdn.domain.com/12345/?name=filename.pdf

where also 

cdn.domain.com/12345/

works fine.

Any workaround to this problem, or it is just not capable to read PDFs form URL that does not follow standard format (e.g. domain.com/filename.pdf) ?