two hunting rifles, clothes, water, whiskey and pyjamas were found in his car.
The Heritage Protection Group (HPG), a non-profit crime-fighting organisation said the 55-year-old had pulled his truck off the road, about 3 miles from Mokopane after it overheated.
It said that a white Nissan stopped next to the vehicle and two men came out with one of them shooting Naude at close range.
They apparently stole a pistol and then fled the scene.
Police spokesperson Lt.col. Mamphaswa Seabi said cops found the man's body next to the truck upon arriving at the scene.
He said: "The man was lying with his face up and there was blood on his head and face."
Preliminary investigations revealed a cattle herder in the area heard a gunshot and spotted a white Nissan pickup truck speeding towards Marken.
According to local reports, Naude who lived in Phalaborwa ran Pro Hunt Africa a professional hunting team that offers tourists the hunting experience.
In pictures shared on social media, it appears that he had killed a number of animals, including giraffes, lions, elephants and zebras.
Another trophy hunter was slammed last year after she posed with a bloody giraffe heart which was cut out of the beast she shot.
Merelize Van Der Merwe, 32, infuriated campaigners by sharing the photo of her "perfect" Valentine's Day gift.
She boasted how her "wonderful" husband paid £1,500 for her to kill an old giraffe at a game park.
And Philip Smith, a hunter who killed Mopane the lion was been "exposed" online after he lured the lion away from his two prides and shot him with a bow and arrow.