This site sucks. It requires an account or Facebook login to access the PDF. I refuse to do this.
Dissecting it with web developer tools, apparently they parse the PDF content server-side and rewrite it as HTML. So you can't just view source and find the link to the PDF file, or intercept the download with a proxy -- you really do have to log in to get the PDF from them, AFAICT.
Can anyone provide a direct link?