I would be happy with uploading a PDF to Files and then linking to the specific file in the wiki using the Link Tool. Whatever works! I just would like a user to go to a wiki page and find everything on that page or on a link from that page.

As for examples of adding a PDF to a wiki - a Google search adding a pdf to a wiki retrieved several. National Cancer Institute wiki. MediaWiki. Wikipedia!

Wikipedia:Creation_and_usage_of_media_files

It says that "As of March 2012, the following file types may be uploaded: png, gif, jpg/jpeg, xcf, pdf, mid, ogg/ogv/oga, svg, djvu. All others are prohibited for security reasons, and pdf and djvu are intended primarily for projects like Wikisource."

Frances