I dont think any blackberry sdk support this facility. There is only one option to view pdf files offline is to download and view using a third party pdf viewer.
Even blackberry dont have given a built in pdf reader to user,when I was looking for the same issue I found that only one company SLG Mobile has made this app(beamreader) and blackberry gave them very special award(dont remember award name now), so this third party app is free for one month and after that you have to pay nearly 500 Rs as licence fee.
Now for BB10 Adob has created a reader and it comes with device itself.