Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5f01da624f49f0…

MALICIOUS

PDF

34.5 KB Authoring application: GIMP
MD5: 7fcd05e5d133c743f8ad8922bd25d28e SHA-1: 87b649a3560885116730a65a4441c7990dee2fae SHA-256: bb5f01da624f49f0124fa3f7f76216d2f6ea9e16c7e3248b1d710ec92271eb4b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a method to distribute malicious content. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall further supports the malicious nature of this document. No scripts were extracted, and the document body content is largely unreadable, but the link farm structure is a strong indicator 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://10iramistakes.com/uploads/1/3/0/6/130604317/9878631.pdf
    • http://criticaluniversitystudies.net/uploads/1/3/0/7/130776474/760b334bde3d9.pdf
    • http://diapersanddogfood.com/uploads/1/3/0/7/130739375/7275bf84f230.pdf
    • http://sibor.superstudy.ru/uploads/2020/01/28/zesibiwix_jaroliwobixeg.pdf
    • http://bestkettlecornever.com/uploads/1/3/0/7/130739227/7618578.pdf
    • http://britishtitties.com/uploads/1/3/0/3/130379675/47a34ab7f.pdf
    • http://mikeintucson.com/uploads/1/3/0/7/130775692/130775692.html#thomson+reuters+journal+impact+factor+2018+list+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112b.bin
8ce7a38532692213079342c365c295e895a1c5857a74a9f3dc9e72d5255330af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112B 8360 bytes

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