According to the agency, SCL Social Limited, which is the parent company of Cambridge Analytica, filed documents with the US Justice Department's Foreign Agents Registration Unit showing that the United Arab Emirates paid it $333,000 for a social media campaign linking Qatar to terrorism.
Media reports indicate the contract included the creation of ads for Facebook, Twitter, YouTube and other sites.
In June, the Trump administration showed support for the Saudi and UAE decision to cut diplomatic ties with Qatar.
READ MORE: Two States Engaged in Qatar Row Involved in Cyberattack on Qatar Media — Doha
The United Arab Emirates, Saudi Arabia, Egypt and Bahrain cut off diplomatic relations and communication with Qatar last year, accusing the country of supporting terrorism and interfering in their internal affairs. Doha, however, has denied all allegations.
