Welcome to the forum.
Remember that today’s good site can be tomorrows infected site.
You can always report the website to Avast if you think the detection is incorrect.
If you’d like someone to look into the problem further, you can post the link that’s detected here
but do not make it a clickable link, Change http to hxxp or www to wxx when you post the link.
If you can also attach a screen of the avast alert window, it will give more of an idea of what the detection is.
If it has happened today and you haven’t rebooted or had a different avast popup, then you can right click the avast tray icon and select ‘Show last popup message’.
It looks like some advertising banner add is going to a site considered malicious (URL:Mal) by avast. This usually means that the site is on some block list. Presumably you were at another site that displays ads.
Is this basebanner.com reflected in the other alerts that you have had ?
This could be a form of ads poisoning is becoming more frequent.
I use the firefox adblockplus add-on, so generally I don’t see these ads and subsequently avast alerts if an ad site is compromised.
It is difficult to say if this is a random case of ads-poisoning or if there happens to be something in your browser trying to connect to malicious/hacked sites.
This will probably need the skills of one of the malware removal specialists, I will try to get one to take a look at this and they will advise on what the next stage is.
SSL verification issue (Possibly mis-matched URL or bad intermediate cert.). Details:
ERROR: certificate common name ‘*.teracreative.com’ doesn’t match requested host name ‘158.85.47.164-static.reverse.softlayer.com’.
Certificate valid through: May 22 19:54:42 2017 GMT
Certificate Issuer: GoDaddy.com, Inc.
SSL Protocols Supported: SSLv3 TLSv1 TLSv1.1 TLSv1.2
Server supports SSLv3, may be vulnerable to POODLE attack. It is suggested to disable the SSLv3 protocol.
Server certificate
Total number of items: 1
Number of insecure items: 1
Insecure URL: htxp://158.85.47.164-static.reverse.softlayer.com/blank.html
Personally I would take essexboy up on his offer (if you are still having problems) to run some analysis tools to see what is what.
MalwareBytes may not be enough for a detailed analysis. After you have attached that log, check out this topic “Logs to assist in cleaning malware” https://forum.avast.com/index.php?topic=53253.0 and run the next tool Farbar Recovery Scan Tool (FRST) and attach the log in this topic. Then wait for essexboy to check out the logs and give further instructions.