Dedicated retirement/pensioner route exists and official English PDF confirms core requirement.
Route overview
Typical timeline / duration: Up to 2 years initially, renewable for an indeterminate amount of time per official PDF.
Important notes
Retiree/pensioner; proof of monthly bank transfer to Brazil; passport and standard visa/residence documents; police/background and consular requirements as applicable.
Official Ministry of Justice PDF says monthly bank transfer to Brazil equal or superior to USD 2,000.