/usr/share/doc/r-doc-pdf/manual/R-admin.pdf is in r-doc-pdf 2.14.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/r-doc-pdf/manual/../../../R/doc/manual/R-admin.pdf
/usr/share/doc/r-doc-pdf/manual/../../../R/doc/manual/R-admin.pdf