/usr/lib/x86_64-linux-gnu/libtiffxx.so is in libtiff5-dev 4.0.3-12.3+deb8u5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libtiffxx.so.5.2.0
/usr/lib/x86_64-linux-gnu/libtiffxx.so.5.2.0