When I placed the cursor over that link, it showed me the URL, with '.pdf' at the end. Doesn't your browser do that?
It's a bit backward, I know, but placing a cursor over a link is a trick that the browsers on phones and tablets haven't caught up with yet!
(Even when I connect an actual USB mouse to the USB port of my phone with an OTG adaptor and get an honest-to-goodness pointer that I can place over a link the browser does not see fit to show me the destination of that link. Not with Chrome on Android Lollipop, anyway.)