Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf4c2293e64f22a…

MALICIOUS

PDF

77.0 KB Created: 2020-10-26 04:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4b174f0ac1c2a541a9d8a8315313c54a SHA-1: e927afd95a5162afac205d6a5eb1a8530787702f SHA-256: faf4c2293e64f22a977bd241859069314ec4152b7c3cc2c81d90a67993953360
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also present in the document body. This indicates an attempt to redirect users to malicious content, likely a phishing or malware distribution site. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.ru/123?keyword=comptia+server%252B+pdf+book In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f960dcd6dbaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f882711a29d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f904bfd0cf12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f90743ea0234.pdfIn PDF document text
    • https://kugixixubeleji.weebly.com/uploads/1/3/4/3/134324677/wosefobesilupelino.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/23afb7e8e919b.pdfIn PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/videxo.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/3cb8123f33c700d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5f959f82bab51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f91d67c651a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8b32bf2c8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8768dd729a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vukumesoj/19131444395.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/baixar_livro_after_2_minhateca.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tosiditeb.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/binary_options_trading_strategy_that_works.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/4d_printing_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e3421e-b455-4204-9c56-c0b183b852ce/vedebekuvitukep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f970f7-e351-4802-a1f0-812fc2e777c2/30355659870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33684ceb-9ecc-41ef-8bb6-f3f94b5daf33/kakunimen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a564b7f1-5763-4462-8c57-dbc0c3b5a101/22181434568.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/vidyasiri_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/37807019406.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 5124 bytes
SHA-256: a122a790c53ef5cfc55dee137c8fa426d70487aaa456812a2379138b2dd59cba
font_01_sfnt_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 11508 bytes
SHA-256: 68dae34038384161997b13d6b16140060248a87a15fceb96b1292cdba0d87bdb
font_02_sfnt_off00011822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11822 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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