FIFA said on Friday that hosts Brazil plus the top seven teams in the rankings on Oct. 17 would be the seeded teams among the 32 for the draw.
"The remaining pots will be based on geographic and sporting criteria," added FIFA.
Spain, Argentina, Germany, Italy, Colombia, Belgium and Uruguay are currently in the top seven with Brazil eighth. Of those teams, Argentina and Italy have already qualified, along with Brazil.
FIFA rejected a request from Iraq to lift a ban on them playing international friendly matches in the country
"The security situation will continue to be monitored," FIFA said in a statement.