Automatically convert permalinks to PDFs in search results to the PDF itself, not the Attachment page

functions.php

<?php

// Automatically convert permalinks to PDFs in search results to the PDF itself, not the Attachment page
function my_force_direct_pdf_links( $permalink ){
	global $post;

	if ( is_search() && 'application/pdf' == get_post_mime_type( $post->ID ) ) {
		// if the result is a PDF, link directly to the file not the attachment page
		$permalink = wp_get_attachment_url( $post->ID );
	}

	return esc_url( $permalink );
}

add_filter( 'the_permalink', 'my_force_direct_pdf_links' );
add_filter( 'attachment_link', 'my_force_direct_pdf_links' );

@2ndkauboy: Thank you! Sorry for the delay on this, I guess you don't get notified about comments on Gists.