atril software package provides MATE document viewer, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install atril
atril is installed in your system.
Make ensure the atril package were installed using the commands given below,
$ sudo dpkg-query -l | grep atril *
You will get with atril package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | X Window System software |
| Package | atril |
| Version | 1.16.0-1 |
| Description | MATE document viewer |
| Sub Section | x11 |