Google released another app in Play Store. Its a dedicated PDF viewer from Google.
The new Google PDF Viewer is very light weighted and supports printing, search, and copying text. The app is primarily aimed at Android for Work, But anyone can download it. Google also provide PDF viewing in Google Drive app but if you do not have Google Drive installed in your phone, you can download the separate PDF viewer now.
PDF Viewing is now available directly in Google Drive. For environments where this cannot be deployed, Google PDF Viewer offers the same capabilities in a standalone app. View, print, search and copy text from pdf documents while you’re on the go.