Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cc8f2eb7661bd4…

MALICIOUS

PDF

41.6 KB Authoring application: Serif PagePlus
MD5: c148636248c5e8767c83e78a46947290 SHA-1: 7b42185870970e289f16516d003ff057df7ea88d SHA-256: a6cc8f2eb7661bd43f2099c61587109685d49a49caebbeda4f9257dad83f7c6b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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 further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body itself appears to be corrupted or truncated, making it difficult to ascertain the exact lure, but the overall structure points to a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://davidsonthecorner.com/uploads/1/3/0/2/130289479/winudidirifozar.pdf
    • http://blaks.online/uploads/2020/01/28/jivipomumizifoz.pdf
    • https://mojalowarobovo.weebly.com/uploads/1/3/0/4/130483349/sixoj_lopufodu.pdf
    • http://mesmeranddeleault.com/uploads/1/3/0/5/130551015/8997315.pdf
    • http://defenselawvt.net/uploads/1/3/0/5/130551187/9270679.pdf
    • http://mycdcfbc.com/uploads/1/3/0/5/130550885/zivavufutavu.pdf
    • http://leta.ai/uploads/2020/01/28/7631036.pdf
    • http://noxonroadpta.com/uploads/1/3/0/4/130476344/44c95.pdf
    • http://981themarcoislandfm.com/uploads/1/3/0/7/130739991/2932609.pdf
    • http://txinvite.com/uploads/1/3/0/4/130489052/vidurexodefowox.pdf
    • http://containerconstructionpros.com/uploads/1/3/0/4/130483614/764691.pdf
    • http://northernrailleaders.com/uploads/1/3/0/7/130740140/130740140.html#cbse+7th+class+english+grammar+worksheets+with+answers+pdf
    • http://txinvite

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c52.bin
0f86e53600c81c8762a42051a4cfd33094064fcb780f782972c88a85acc759ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C52 7924 bytes

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