Hi Guys, I would love this feature too into AF. It's such a handy thing to have.
Ok, for now, I've figured out a simple workaround, though this relies heavily on the user opening the PDF using MAC Preview or Adobe PDF. So this is more of a temporary solution.
Both these tools can now read links if you have the entire extension in their full form so don't just write www.yoursite.com.au instead write https://www.yoursite.com.au.
Now that might look messy including the "https://" in a display. So what I've also found that also works is overlaying a text bit with 0 opacity and that too seems to work well.
Again both these rely on the PDF viewer/reader to make the linking work. I hope this helps someone. I do hope they implement a more robust linking system as soon as possible though. thanks.