If it's just for free direct download, I don't see the point of a plugin. To prevent hotlinks, you can do that from .htaccess file
http://www.javascriptkit.com/howto/htaccess10.shtml
change the
gif|jpg|js|css
to
pdf
If it's just for free direct download, I don't see the point of a plugin. To prevent hotlinks, you can do that from .htaccess file
http://www.javascriptkit.com/howto/htaccess10.shtml
change the
gif|jpg|js|css
to
pdf