Malware Alert for an Avia File

Dear Support:

I’m getting the following alert from Wordfence regarding one of the theme files:

File contains suspected malware URL: /home/romereview/www/www/wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/html-helper.class.php
Filename: wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/html-helper.class.php
Bad URL: http://www.link.at/
File type: Not a core, theme or plugin file.
Issue first detected: 2 hours 23 mins ago.
Severity: Critical
Status New
This file contains a suspected malware URL listed on Google’s list of malware sites. Wordfence decodes base64 when scanning files so the URL may not be visible if you view this file. The URL is: http://www.link.at/ – More info available at Google Safe Browsing diagnostic page.

My question is: should the link to “http://www.link.at” be there and, if not, what should I do?

Thank you.

Tim