OT? file name

RIO, the tackle company has a .pdf file available online that shows basic
knots and how to put backing/ line/ leader all together on the reel

Good idea, right?

but

the file name is

c2974c9203c91d170f3fffe97733597.pdf

not exactly something easy to remember or clear about file content when you
want to find it in your 'puter clutter.

I can't think of a single reason why anyone would come up with such a
bewildering file name ( it's NOT dynamically generated for customer
tracking, I've two copies downloaded several months apart ... since I
couldn't find the first one when I wanted it ... and they both have the
exact same name ) and put it on the 'Net Actually makes me wonder if
maybe the RIO people aren't a bit odd