Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c4fb7778179733…

MALICIOUS

PDF

36.6 KB Authoring application: pdf-parser
MD5: f73dce1587c28d70bce63b37bf43bdad SHA-1: f142c0ac7c959ae08d750d8b0c5f400705ef73a3 SHA-256: c6c4fb77781797331a6ab94b8b72fb56c27679d63ca7767a700c543372b276c9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further indicate malicious intent. The embedded URLs suggest a phishing or SEO spam campaign designed to redirect users to potentially harmful content.

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://bibamate.com/uploads/1/3/0/2/130272342/493520.pdf
    • http://marthadoesnotlivehere.com/uploads/1/3/0/3/130379757/3434f5badfb.pdf
    • http://limpiomallorca.com/uploads/2020/01/28/favapax.pdf
    • http://structuredsettlementsweepstakes.com/uploads/1/3/0/4/130488312/3307671.pdf
    • http://ingenieriadesarrollohumano.com/uploads/1/3/0/4/130483858/1231984.pdf
    • http://honeyee.us/uploads/1/3/0/6/130621642/bazevatediw-gimexitur-zutafitedipubu.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/6/130604401/130604401.html#difference+between+discourse+analysis+and+critical+discourse+analysis+slideshare

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001173.bin
ad86775d81f5f8d7c42e1a0eae05b48ff7b4b6196813d2fc67efc3ca498513c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1173 8196 bytes

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