Hi Elliott - I actually edited my post to say "custom" reports not "customer". 🙂
In our Analytics section we have a folder titled Other Reports. In there we just have custom reports that we've created - but I believe the folder itself is a default. Anyway, for my report I just ran a SL with the same basic criteria Sherry posted (Click Link - contains) then put the name of a PDF in there that resides in Design Studio.
Sherry - to further what Elliott is saying - if you create a SL outside of Analytics, do you get any results?