The Verdict: Not eligible
Citizenship by descent needs a Brazilian in your family, so this route is closed to you. Look at Brazil's residence routes instead, which lead to naturalisation after one to four years.
Residence routes that do not depend on ancestry: remote work for a foreign employer, a pension paid from abroad, investment in a company or property, a job offer, marriage or a stable union with a Brazilian, and for most South American nationals a residence agreement that needs no job offer.
Naturalisation then takes four years of residence, or one year with a Brazilian spouse, partner or child, or the nationality of a Portuguese-speaking country. Our naturalisation quiz sets out each.