I want to redirect a file url of an old website www.test.de/pdf/doc.pdf to the new cake page where the pdf will be in app/webroot/files/doc.pdf. Is this possible with Cakephp? I don't have the option to do rewriting on the webspace.
You can use the Router to redirect:-
Router::redirect('/pdf/doc.pdf', '/files/doc.pdf');
You'll find further details about redirecting with the Router in the official docs.