Fenton

On Aug 17, 2007, Virus Guy wrote:
> PDF's are still an ergonomically poor way to convey spam payload given
> the lack of automatic rendering. They may be in use now because the
> PDF format is somewhat proprietary. Commercial server and client-side
> filter software may not have permission or the license from Adobe to
> impliment PDF decoding routines that are necessary for content
> inspection (but you would think it would be in Adobe's best interest
> to provide it to them gratis).

I'm pretty certain the PDF specification is open to the public.