Donald Trump's presidential campaign turned some heads this week on news that it used a mysterious, seemingly "Mad Men"-inspired entity for advertising work.

The presumptive Republican nominee's campaign paid an organization called Draper Sterling $35,000 for "web advertising" in late April, according to a Federal Election Commission report filed Monday. The New Hampshire outfit bears the names of fictional ad executives Don Draper and Roger Sterling from the AMC drama "Mad Men."

Draper Sterling lists an address in Londonderry, New Hampshire. The organization is registered in the state under the name Jon Adkins, who separately took in $3,000 from the Trump campaign for "field consulting," according to the FEC filing.

Google's location services show a tree-filled residential area around the listed address. It also hosts White Mountain Designs, one of two other entities registered to Adkins in New Hampshire.

CNBC could not immediately find a website or contact information for Draper Sterling. The New Hampshire registry does not list what the organization does.

Adkins could not immediately be reached for comment. A Trump campaign spokeswoman did not immediately respond to a request for comment.



Another man, Paul Holzer, received $3,000 for field consulting from the Trump campaign and listed the same address as Adkins. The men are listed as co-founders of Xeno Therapeutics, a medical nonprofit start-up based in Boston, according to NBC News.

Holzer's brother is Adam McLain, who runs the super PAC Patriots for America, NBC said. The PAC owes more than $56,000 to a firm also called Draper Sterling. That organization, though, is based in Delaware, and it is unclear if it is the same one Trump's campaign paid.

The Trump campaign reported the payments to the New Hampshire Draper Sterling in a monthly FEC filing that showed him significantly trailing presumptive Democratic nominee Hillary Clinton in the money race. Trump's campaign ended May with only $1.3 million on hand, while Clinton's had more than $42 million.

Still, the Trump camp downplayed the disadvantage, saying in a statement Tuesday that June will mark its first full month of fundraising activity. It cited its joint fundraising efforts with the Republican Party.

The campaign said it could have "unlimited" cash on hand if Trump chose to front more of his own money. He has loaned nearly $46 million to his campaign so far, but can get paid back.