Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51fb4c12f101809…

MALICIOUS

PDF

39.3 KB Authoring application: PDFBox
MD5: 90ca278f16794d92392c8915d4448378 SHA-1: 34b82f2ac7047d9f2b41696a756bc8d50704c10c SHA-256: f51fb4c12f10180926336e6696dc3d5316f985dc574bed53827756b7714bc6b9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection scheme. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.TtraffRobotInstall. The document body contains garbled text but also lists many of the external URLs, reinforcing the link farm attack pattern.

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://5foot1ninja.com/uploads/1/3/0/4/130489222/8083340.pdf
    • http://wallepikkers.nl/uploads/1/3/0/6/130639486/fuvutuve-xedivilopedafal.pdf
    • http://keves.iddingwitsof.mobi/uploads/2020/01/27/dikopizefezivu-gofuxerowupawib.pdf
    • https://zexafabu.weebly.com/uploads/1/3/0/2/130289272/tujubemoze.pdf
    • http://spectrumlifecare.net/uploads/1/3/0/4/130483953/vifes.pdf
    • http://omnibodyfitness.com/uploads/1/3/0/5/130588847/xopur_sokokozi_zekalanapuxe.pdf
    • http://rebeccaattia.com/uploads/1/3/0/6/130620828/nolanukedaxizojimoge.pdf
    • http://giwizem.armion.tech/uploads/2020/01/29/f6e091506.pdf
    • http://prettiekitteedeals.com/uploads/1/3/0/6/130620172/03f078dadcc.pdf
    • https://vinuniludab.weebly.com/uploads/1/3/0/3/130323493/6861383.pdf
    • http://missioncovenantyouth.org/uploads/1/3/0/6/130605498/jijulomorivizufi.pdf
    • http://jazzheartjazz.com/uploads/1/3/0/6/130605405/dobigezokuditunabi.pdf
    • http://uppetition.ru/uploads/2020/01/27/zupewakekubewusew.pdf
    • http://whatthesaintsknew.org/uploads/1/3/0/5/130539155/sijufapizuku_zorazupufudol_simelajiwerar.pdf
    • http://xegon.stoloto.info/uploads/2020/01/27/3022115.pdf
    • http://naturalbirthingjoy.com/uploads/1/3/0/4/130476853/fa59f7d6231.pdf
    • http://obituar.org/uploads/1/3/0/5/130539113/1749869.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/5/130551416/130551416.html#avg+mac+os+x+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001520.bin
0d098d33397af7cf6b0d0af0244bdafdd4fc9cdf0fb6fefdcf2c27043c919c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1520 8460 bytes

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