Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a800c99cdb527a…

MALICIOUS

PDF

42.4 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: 880977bf6cfe4f141cc2512d857d0427 SHA-1: 69543075654cabb0f49410b35700f4fac5d67fd2 SHA-256: 21a800c99cdb527a1712fff0981921926be9f1f7ec5049f8e255c2262d269185
152 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ClamAV with the signature Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded external links, indicating a link farm designed to redirect users to potentially malicious sites. The primary heuristic firing, PDF_SEO_LINK_FARM, directly supports this observation, highlighting the mass external PDF link farm as the main malicious characteristic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://ragnarlegend.com/uploads/1/3/0/6/130639936/7930927.pdf In PDF document text
    • http://mirrorimagemissions.com/uploads/1/3/0/7/130740477/2537643.pdfIn PDF document text
    • http://www.yamahapianocostcoevent.com/uploads/1/3/0/3/130313102/04c92e40851.pdfIn PDF document text
    • http://brunostippe.com/uploads/1/3/0/7/130776002/7456818.pdfIn PDF document text
    • http://numinersfootball.com/uploads/1/3/0/4/130483937/nolilad.pdfIn PDF document text
    • http://dc-9703e2fc3781.swfarm.net/uploads/1/3/0/6/130621351/045449.pdfIn PDF document text
    • http://prosperingmedia.com/uploads/1/3/0/3/130323596/e9930ccf.pdfIn PDF document text
    • http://myidahoinsure.com/uploads/1/3/0/3/130379246/zegudisu.pdfIn PDF document text
    • http://cusacklab.com/uploads/1/3/0/3/130323465/sojivavawawito.pdfIn PDF document text
    • http://paganacademy.org/uploads/1/3/0/8/130814769/2034654.pdfIn PDF document text
    • http://msiclick.com/uploads/1/3/0/5/130550704/jolikinuso.pdfIn PDF document text
    • http://traveltyme.voyagerwebsites.com/uploads/1/3/0/8/130874386/130874386.html#logistic+regression+meaning+spssIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE1 8228 bytes
SHA-256: 9a0e9c63cb9afad621b4770f32d1e13e8d106ba45fc4cb8bbae7af810af6c842

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