/usr/lib/x86_64-linux-gnu/root5.34/libSpectrumPainter.so.5 is in root-plugin-hist-spectrumpainter 5.34.30-0ubuntu8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/root5.34/libSpectrumPainter.so.5.34