Sao Paulo, as per Rio, can lull you into a false sense of security. Many trips can go by without incident. However, there is a credible and significant risk of violent crime, and all business travelers are at high risk of opportunistic crime no matter what your company, role, or reason for travel.
There is a propensity for violence in Brazil unlike many other countries, fueled by massive disparity of wealth, the easy availability of firearms, the influence (and power) of drug- and arms-trafficking gangs, and under funded and ineffective policing.
Each year a number of foreigners are killed or injured during attempted robberies, car-jackings and express kidnaps, the majority of targeted victims do not have personal security, or have not carried out basic security protocol.