Now those sharing it have demanded that people help identify the attacker, who is believed to be from Brazil.
While the reason for the attack is unknown, several users pointed out that it would not be unusual in the country to severely beat a woman as a punishment for being promiscuous.
But many Brazilians rejected that was the case and urged others to do their best to try and track down the man or the woman.
Those who shared the video seemed to wrestle with their conscience of spreading the horrifying clip further – but admitted that they did to hopefully identify the attacker.
One wrote: “I abhor violence against women and especially putting something sick like this online, but with this man still at large and the woman may be desperately needing help, I think it should be shared as much as possible.”
Another wrote: “This is unbelievable. The violence against women around the world is so disturbing, and has been going on for centuries.
“This man should be hung by his genitals. There can be no justification for this in the modern world.”
Warning: The content of this video is extremely disturbing. Viewer discretion is advised.
The full video of the actual beating is below.