This file is indexed.

/usr/lib/x86_64-linux-gnu/libsignon-qt5.so.1.0 is in libsignon-qt5-1 8.59+17.10.20170606-0ubuntu1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/x86_64-linux-gnu/libsignon-qt5.so.1.0.0