Scott Dworkin, from the anti-Trump group Democratic Coalition, tweeted images of documents revealing the link.
The document appears to show that in 2015 lawyer George Conway represented Hewlett-Packard Co and Hewlett-Packard Mexico in the US District Court in Northern California, San Jose division in a case brought by Petroleos Mexicanos and Pemex Exploracion y Produccion.
It read: “Pemex pleads that HP Russia used a German agent to bribe Russian officials to secure a contract with the prosecutor general of Russia.”
It comes after a series of claims regarding Trump’s former National Security Adviser Michael Flynn and his campaign team and their links to Russia.
The President and his team have strongly denied all the reports, calling them “nonsense.”