A PDF add-on for the built-in eBook reader of MiXplorer file manager. MiXplorer v6.27.2+ has to be installed first.

Download MiX from XDA store:
labs.xda-developers.com/store/app/com.mixplorer
From version MiX PDF 1.3:
Fixed opening the links.
Variant
Arch
Version
DPI
(arm)
Latest: 1.3 on March 12, 2018
(arm64)
Latest: 1.3 on March 12, 2018
(mips)
Latest: 1.3 on March 12, 2018
(x86)
Latest: 1.3 on March 12, 2018
(x86_64)
Latest: 1.3 on March 12, 2018
All versions
March 12, 2018
January 26, 2018
August 7, 2017
July 5, 2017