Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3a3e6ee8506a6a…

MALICIOUS

PDF

65.7 KB Created: 2020-11-22 04:32:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2eccef65b6686b8ea136fe355e9f1fba SHA-1: 42ceeea079b7ef2d2cae46c5524f274794339fd5 SHA-256: 9d3a3e6ee8506a6ad671df45c1168f75500265a608448f63084382388a1d35dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'trafffi.ru' which is flagged as unknown reputation. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm for SEO manipulation or malware distribution. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafffi.ru/aws?utm_term=dissociative+identity+disorder+test+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457857/normal_5fa6b6250024e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f8f9ac787346.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/mejisasemexa_mexidixuxoguri_pomadito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5f9862121eeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f95407fe585f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5fa7298315001.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/lepubefukudarin-xapuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/roxawo/apache_flume_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7abb8b-ad3d-4f19-a9ff-e987c06cd3d9/75703722669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2502c5d-84ba-41a1-9dde-baa784e7d646/anime_aishen_qiaokeli-_ing_sub_indo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e798e44-d473-4aae-beb6-8c60dbfb0d23/68521931722.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn 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_off0000c63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63A 5276 bytes
SHA-256: 15743187544dc4199fb5a61032f54338b8fdf9e019b55b131ea481d10aa275d6
font_01_sfnt_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 9996 bytes
SHA-256: 8619077e6804e67f371f5ad837e77aea85f8a47987862809f957103d2490ae55

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