B777-200
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 150; Flight Crew Total 20000; Flight Crew Type 6000
Confusion; Distraction; Time Pressure
Conflict Airborne Conflict; Deviation - Track / Heading All Types
Flight Crew Took Evasive Action
Environment - Non Weather Related
At 4;700 feet on vectors to intercept ILS 9R at GRU about 7 miles from the airport. We saw an object at 12 o'clock. I immediately turn the airplane to the right to miss the object. As we passed the object it appeared to be some sort of balloon. It was black in color; cylindrical in shape; approximately 20-30 FT tall and 5-10 FT wide. Hanging 10 to 20  FT the balloon by rope or cable was a metal structure about 5 FT square.
An air carrier took evasive action from a large unmanned balloon trailing a 5 foot square metal object while on vectors at 4;700 FT; 7 miles from SBGR (GRU) Runway 9R.