If you just upload a PDF and use the Add Media button you get this:
Microbial Origin of Desert Varnish -JStor1687344
If you link to a shared PDF hosted on Google Drive, and have iFramely activated, you get this:
If you just upload a PDF and use the Add Media button you get this:
Microbial Origin of Desert Varnish -JStor1687344
If you link to a shared PDF hosted on Google Drive, and have iFramely activated, you get this: