Maybe you can adapt this function by adding a new page in back-end and then create a new php file name page-{your-page-slug}.php,header-ads.php and footer-ads.php in your theme root. In your page-{your-page-slug-here}.php should be something like this
<?php get_header(‘ads’);?>
<?php echo do_shortcode(‘[aas_zone zone_id=”{zone_id}”]’);?>
<?php get_footer(‘ads’);?>
Make sure that the header and footer file contain only scripts and styles. Things like menu or footer should not be here.
Finally, your iframe src should be something like https://www.yoursite.com/your-page-slug
Cheers