The global ratio of spam in email traffic in July increased to 77.8% or one in 1.29 emails, up 4.9% compared with June, according to a study by US security firm Symantec (Nasdaq: SYMC).
In Brazil, spam accounted for 78.7% of email traffic.
Regarding spam sources, India (15.5%), Brazil (13.1%) and Russia (6.4%) are in the top three spots.
Phishing activity increased by 0.01 percentage point since June, meaning one in 319 emails comprised some form of phishing attack. The primary motive of these attacks continues to be identity theft.
The main target of phishing attacks in July was the public sector, while the automotive industry remained the most spammed industry sector.
In Brazil, one in 382 emails were blocked as phishing attacks, and one in 332 emails contained malicious content.
With one in 62.1 emails being blocked as malicious, the public sector remained the most targeted industry in July.
Overall the analysis reveals a significant increase in malicious activity with one in 281 emails identified as malicious in July. The report shows that the malware is frequently contained in attached files.