How i add new link after Edit | Quick Edit | Trash | View in quick edit section

You can do it by creating a hook for post_row_actions filter. If your CPT is hierarchical post type use page_row_actions filter.

add_filter( 'post_row_actions', 'wpse8170_row_actions', 10, 2 );
function wpse8170_row_actions( $actions, WP_Post $post ) {
    if ( $post->post_type != 'my-custom-post-type' ) {
        return $actions;
    }

    $actions['wpse8170-pdf'] = '<a href="http://your/url/here">PDF</a>';
    return $actions;
}