Missing Controller

Error: Survey.pdfController could not be found.

Error: Create the class Survey.pdfController below in file: app_media/controllers/survey.pdf_controller.php

<?php
class Survey.pdfController extends AppController {

	var $name = 'Survey.pdf';
}
?>

Notice: If you want to customize this error message, create app_media/views/errors/missing_controller.ctp