/usr/lib/x86_64-linux-gnu/libQtSvg.so.4.8 is in libqt4-svg 4:4.8.6+git64-g5dc8b2b+dfsg-3+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libQtSvg.so.4.8.6
/usr/lib/x86_64-linux-gnu/libQtSvg.so.4.8.6