7 New Trophies in this DLC

Bronze

[Virus Run] World Ace
Achieve multiplayer rating 'Ace'.

[Virus Run] We are the Champions
Both players should get first and second place in any Lap Race mission in Split Screen mode.

[Virus Run] Virus Spreader
Infect 4 cars during one match in Virus Run mode.

[Virus Run] Score Hunter
Score 7500 points in one match in Virus Run mode.

[Virus Run] Infector
Infect 2 cars during 6 seconds in Virus Run mode.

[Virus Run] Smash Cars Ultrastar
Get 50 stars in one single player or split screen level. You must earn a bronze medal or higher in order to unlock the trophy.

1 Secret

http://www.ps3trophies.org/news-540-DLC-Added--Smash-Cars.html