"One DNS hijacking technique involves changing what’s known as the DNS A record." Could be any record, depends on the intentions of the hijacker. Typically we

"One DNS hijacking technique involves changing what’s known as the DNS A record." Could be any record, depends on the intentions of the hijacker. Typically we see web traffic being hijacked to another ipv4 host which indeed, is an A record. Another abuse option could be to alter SPF/DKIM to do a more sophisticated phishing campaign.