Yes, it will work, but you should check the radio field first because it doesn’t make sense to get the values for the file unless you’re actually going to show them.
<?php
if (get_field('product_brochure') == 'yes') {
$file = get_field('product_brochure_pdf');
if ($file) {
?>
<a target="_blank" href="<?php
echo $file['url']; ?>" title="<?php
echo $file['title']; ?>"><?php
echo $file['title']; ?></a>
<?php
} // end if file
} // end if product_brochure
