curious: why is this [scribd] when the link is (thankfully) to a raw pdf?

oh snap! the [scribd] is a separate link. neat. i wonder if a raw pdf was submitted and [scribd] added, or if the reverse occurred or is possible.

AFAIK, HN sees a PDF submission and automatically sets up the scribd link. It used to be that all PDFs were automatically converted to scribd, but that caused a bit of an outcry.