A federal judge denied a convicted terrorist’s last-ditch bid for acquittal, according to new court papers.

US Air Force vet Tairod Pugh was found guilty by a Brooklyn jury in March of plotting to join ISIS and filed a standard post-conviction “Rule 29” motion for acquittal.

In his decision issued Tuesday, Judge Nicholas Garaufis found that prosecutors successfully proved Pugh became an ISIS sympathizer and immersed himself in online terrorist propaganda before planning to travel to Syria to join the group.

Jurors heard how Pugh downloaded more than 70 ISIS videos and penned a letter to his wife, which was never sent, pledging his support for the terror group.

“I am a sword against the oppressor and a shield for the oppressed,” the letter read. “I will use the talents and skills given to me by Alllah to establish and defend the Islamic States.”

Pugh, who spent four years in the Air Force in the early 1990s and then worked in the Middle East as an airplane mechanic, faces up to 35 years behind bars.

He was the first-ever American convicted by a jury of attempting to provide support to a terror organization.

Pugh’s first motion for acquittal, filed during the trial, had also been denied.