I've been trying to do some work with .swf files lately as well, unfortunately I haven't had too much luck. I was reading through the SWF::Element docs earlier, the description goes like so:

SWF::Element module handles SWF tags and any other sub elements to create, configure, clone, pack to bit strings, and unpack from bit strings.

Then later (near the bottom of the documentation, under actions) it lists ACTIONRECORD::ActionGetURL which 'directs the player to get the specified URL.' I haven't tried working with this yet, but thought I'd mention it in case it was helpful.