Edit: it seems like the NYT missed the mark on this one.
AP reports:
Two eyewitnesses, Anna Ravn and Marie Adrian, told the daily BT that they saw a man walking toward the prime minister and then “pushing her hard on the shoulder so she was shoved aside.” They stressed that she did not fall down.
This is blown way out of proportion or a bad translation
This article with eyewitness reports tells that a man going the opposite way, across a city square, gives the prime minister a hard shove on the shoulder, and she almost falls over, but avoids to fall. Attacked? Yes. Beaten: No