It's a sensation! WhatsApp doesn't only support image / video / music sending anymore, now there's an option for PDF too!
According to AndroidPolice the option is in the non-beta as well as beta version available but it's a server side roll-out.
WhatsApp hasn't confirmed anything yet but there are a couple of screenshots available online and I can also confirm the new option.
In addition to that: There's a new contact details design in the beta versionâ€¦