What unknown_html malware is there on this URL?

Nothing here: http://sitecheck.sucuri.net/results/espn-large.ff0000-cdn.net
Unable to properly scan your site. Site returning error (40x): HTTP/1.1 404 Not Found
Vulnerable: http://ics-cert.us-cert.gov/advisories/ICSA-12-354-02
Using crossdomain.xml files can be very dangerous → http://www.jamesward.com/2009/11/08/how-bad-crossdomain-policies-expose-protected-data-to-malicious-applications/ link article author = James Ward
Malicious file are flagged by Quttera: Malicious files: 1

Severity: Malicious
Reason: Detected known malicious content.
Details: Threat detected according to previously retrieved information
File size[byte]: 454
File type: ASCII
MD5: BFEC63231E96097E89B8A7C39A7D1B8E
Scan duration[sec]: 0.001000
gp1.wpc.edgecastcdn.net/00222B/jtest/v6beacontest.js
Severity: Suspicious
Reason: Detected hidden reference to external web resource.
Details: Detected hidden iframe tag to ‘gpb1.wpc.edgecastcdn.net
Offset: 44
Threat dump: [[