[tssva]

Using a zero install PDF viewer, the wsb login command and a few lines script file one could also have the PDF automatically open in the Windows sandbox with a double click or using "Open with" from the context menu.

[jmprspret]

You could piggyback off MS Edge in the sandbox to open the PDF. Provided you don't need any advanced features, and just want to read it.

But yes that is a great idea.

[tssva]

I was more thinking of running a portable pdf viewer such as Foxit Reader Portable from a folder mounted read only in the sandbox.