Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21e0dc998c0d32f…

MALICIOUS

PDF

86.4 KB Authoring application: pstoedit First seen: 2020-09-07
MD5: 656ddd2af589fbd66ac10b292640a89d SHA-1: 27440490136ea006f35b4031d37509261d2f4ee9 SHA-256: b21e0dc998c0d32fe111bd0867f0f3b33e7dc7f19be3b05c987a77cdc8523b1e
152 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a significant number of embedded external links, many of which follow a similar pattern of numeric or slug-based filenames within dated directories. This suggests a link farm or redirection scheme designed to lure users to potentially malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the immediate intent beyond the link farm.

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://tofawumat.woltag.com/uploads/2020/01/28/1786344.pdf In PDF document text
    • http://cuisineandspirits.com/uploads/1/3/0/6/130621305/zaxija-sedilerajopitun-gonaz-fenadifefota.pdfIn PDF document text
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/2/130271179/a38f152.pdfIn PDF document text
    • http://aprendizajeactivobrumiel.com/uploads/1/3/0/8/130814205/3744711.pdfIn PDF document text
    • http://bestjacksonbonding.com/uploads/1/3/0/5/130543418/15301.pdfIn PDF document text
    • http://tylerdsmith.org/uploads/1/3/0/4/130488387/lowamamux-gibos.pdfIn PDF document text
    • http://laurenobern.com/uploads/1/3/0/3/130313649/bivonixigodok.pdfIn PDF document text
    • http://moirarogers.net/uploads/1/3/0/7/130739389/e49a0538e644781.pdfIn PDF document text
    • http://treasureoftheandes.com/uploads/1/3/0/4/130436483/gogujedakodepusarute.pdfIn PDF document text
    • http://myguillermofloresuagro.net/uploads/1/3/0/5/130589231/994231baabeb.pdfIn PDF document text
    • http://shs2020.com/uploads/1/3/0/2/130288562/nifora_farobofediv_fusowajobobide.pdfIn PDF document text
    • http://multistreams.com/uploads/1/3/0/6/130621640/130621640.html#marina+abramovic+the+artist+is+present+analysisIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1759 12916 bytes
SHA-256: 56a735d1753b828e0261ef850e5221ed842c69cea210cc1e4d30f0fa620534d0
font_01_sfnt_off00007569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7569 16592 bytes
SHA-256: 289a6186da0da51d7ceb6e56387d1db863cba7d5ed94561282dd229293510225

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