Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3a8c6f07edc184…

MALICIOUS

PDF

55.9 KB Authoring application: Karbon
MD5: 5fb71a1467ffa3203dc16bcb3bade67b SHA-1: f920d6ccb745f2254c9756cff566d46c0062606d SHA-256: cd3a8c6f07edc184a7af062b90d751a72f13ce3b3c4f16813b690588f3b22b82
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. No scripts were extracted, and the document body is heavily obfuscated, but the link farm heuristic is highly indicative of malicious intent.

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://outdoorsmetalguy.com/uploads/1/3/0/5/130589409/rikupax.pdf
    • http://vintagechicanew.com/uploads/1/3/0/6/130621321/dapozufadebebo-gifewolidofet-weruxosafe.pdf
    • http://mysticgardentw.com/uploads/1/3/0/5/130550944/kidizili.pdf
    • http://dexux.nolep-checker.net/uploads/2020/01/28/3582765.pdf
    • http://konilasu.suddenweblink.online/uploads/2020/01/28/7213363.pdf
    • http://bmcl.us/uploads/1/3/0/4/130476185/sorofutapuvedutate.pdf
    • http://customerexperienceworld.co.uk/uploads/1/3/0/5/130551303/9499002.pdf
    • http://zepprecisionmachines.com/uploads/1/3/0/2/130272083/dujewuzomirikalebuxa.pdf
    • http://mickkok.com/uploads/1/3/0/5/130588230/3bd6cce172.pdf
    • http://missouridwi.info/uploads/1/3/0/5/130543467/9c2e8e29.pdf
    • http://michaudwellness.com/uploads/1/3/0/6/130603715/130603715.html#seizures+in+babies+with+down+syndrome

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ec.bin
61506542932768a196e96f99767c6275ee2417f6a5b70f1cb6bd8ac11a48e8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC 8584 bytes

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