You are downloading the Adobe Reader AppX file v188.8.131.5259 for Windows Phone. Adobe Reader is a free and useful Productivity app: Adobe Acrobat Reader is the free, trusted leader for reliably viewing and annotating PDFs. VIEW PDFs• Quickly open PDFs from email, the ... You can now download the offline AppX file to install & try it.
Download Locations for Adobe Reader 184.108.40.20659 AppX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline AppX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Adobe Reader AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.