Lily Collins has been named the most "dangerous" celebrity to search for online.
Online searches for her name along with the words "free app download" or "nude pictures" result in more links to "risky" websites than any other celebrity, the firm said.
The Mortal Instruments star Lily tops a string of figures whose names are most likely to link to a website that has tested positive for threats such as spyware and viruses.
Women apparently generate more risky links than men. American actor Jon Hamm was the only male celebrity in the top 10, according to the study.
"We have got used to accessing the latest gossip and pictures of our favourite celebrities on demand," McAfee's Raj Samani said.
"But we need to remember that cybercriminals take advantage of the latest cultural trends, new movies and hit TV shows to target unsuspecting consumers seeking more information.
"These criminals want to lure us to unsafe sites that can severely infect computers and devices and even steal personal data."