Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba1a95a191b9737…

MALICIOUS

PDF

39.5 KB Authoring application: pstoedit
MD5: 0c6e27bd0635df7102df99cb790065c3 SHA-1: 3e04701d579c9dbf94f051b458656d92a96295f2 SHA-256: 6ba1a95a191b9737b88c5ce4f582e032b9987672547eed44cfd1e7791643b979
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and a ML classifier, indicating malicious intent. The document contains a large number of embedded URLs pointing to external PDF files hosted on various domains, suggesting a link farm or distribution mechanism. ClamAV identified the file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', further supporting its malicious classification.

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://modernjeetkunedo.com/uploads/1/3/0/8/130814248/gisojifa.pdf
    • http://lgbaonline.org/uploads/1/3/0/7/130740498/9757666.pdf
    • http://christiancounselinghealing.com/uploads/1/3/0/6/130621132/5778027.pdf
    • http://mybloomyoga.com/uploads/1/3/0/3/130324044/9014ce6f1.pdf
    • http://nathantylerdavisfoundation.com/uploads/1/3/0/6/130622080/xudagisom.pdf
    • http://cloggingworkshops.info/uploads/1/3/0/6/130639242/parogamevexote.pdf
    • https://jiduputagadom.weebly.com/uploads/1/3/0/3/130323469/f2393368.pdf
    • http://avalonbeachpodiatry.com.au/uploads/1/3/0/5/130539309/tisolanilid-didifikalofo-migumetom.pdf
    • http://northernrailleaders.com/uploads/1/3/0/4/130483527/130483527.html#possessive+adjectives+worksheet+for+grade+5
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013ba.bin
109a8d5a1a08c46446f5c512b06ce33e626aba57bb37f696ee0af4dac7d5f225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA 8468 bytes
font_01_sfnt_off00005414.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5414 16036 bytes

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