How to open Pdf files

Do you know it beforehand, or does the user have to find it, on a web page?

this pdf file is result, when result is released on website then i will try to show in my app

You should report it in Google Forums, actually.

Is there anyway to copy or extract text in pdf from this method

The pdf is displayed as images in a webviewer, it may be possible to extract the images then OCR them ?