Malicious PDF — malware analysis report

Static analysis result for SHA-256 740669e4cee1f221…

MALICIOUS

PDF

33.3 KB Authoring application: Mobipocket Creator
MD5: e2165155e14bb6ba2d73242457af4aaf SHA-1: 31367f55451506bca2b06d9ad2e36f7952cde58f SHA-256: 740669e4cee1f221c7421edb0804fabf21ea1f77c6323d401f3ee8207516b177
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files, identified as a link farm. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, suggesting a mechanism to redirect users to malicious 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 https://jedezejavotijox.weebly.com/uploads/1/3/0/2/130289284/1191156.pdf
    • http://sezoxo.avangardenspace.com/uploads/2020/01/28/1202704.pdf
    • http://sidetalknyc.com/uploads/1/3/0/5/130589334/zumuwakinisunuti.pdf
    • http://pkogroup.ru/uploads/2020/01/27/95d40f0.pdf
    • http://053748270.com/uploads/1/3/0/4/130491703/tixije.pdf
    • http://relepole.rectaparrew.com/uploads/2020/01/27/00f9297cf63a77.pdf
    • http://newleaf-dayspa.com/uploads/1/3/0/5/130545827/giragelonosiwab.pdf
    • http://thehappygirlstore.com/uploads/1/3/0/4/130476733/130476733.html#division+worksheets+for+4th+grade+printable

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000110b.bin
f8e157ac989ed6e5bca35e774fecdfcb50a9123fce7c00de0b67a44fd142ec6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110B 7348 bytes

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