There is an option to withdraw on PS where you can withdraw directly from your account. Go to the box -> withdraw -> Just fill in your bank details that will work. You must pay a small fee when converting from dollar to real. I think this option is the safest. There are sites for buying and selling chips where you can send your $ to their player account and they send you the amount in reais in your bank account charging the current quote.
To receive your money from Poker Stars to your bank account you can cash out directly from PS to your bank account or you can use the Pay4fun wallet..I usually use the both options and I choose the one with better conversion rate at the day of the cashout.