Malicious PDF — malware analysis report

Static analysis result for SHA-256 42006cd9b106c32e…

MALICIOUS

PDF

50.6 KB Created: 2020-11-06 03:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ea22a9d85e636e0c6eca1474cfcb84c SHA-1: d7a6f1e4d3f9473b770a25cf6a4aef56d0cf7d4e SHA-256: 42006cd9b106c32eb9bc6d986ab622dd1a147d0bff5a6b21412564baa82c6ab5
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the document body, though obfuscated, contains URLs that are likely part of a link farm designed to drive traffic to malicious infrastructure. The primary malicious URL identified is https://traffine.ru/123?keyword=zippo+hand+warmer+not+working.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?keyword=zippo+hand+warmer+not+working In PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/3324948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5f9b83c4cb472.pdfIn PDF document text
    • https://faxosuxen.weebly.com/uploads/1/3/4/3/134342902/nizukozokorusotid.pdfIn PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/d43bb1.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/9035290f1788611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f9da206114c2.pdfIn PDF document text
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/madazakogu_xerubixanug_libopuxeme_nesebok.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/6367849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5fa4a248b402f.pdfIn PDF document text
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/562751abda8e1.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/jemazejodep/modelo_biopsicosocial_ventajas_y_desventajas.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/medical_card_exemptions_texas_cdl.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/biology_past_papers_o_level.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/wedup.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/calendario_rusia_2018_chile.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/learn_advanced_javascript.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AF 5276 bytes
SHA-256: 0c13b2184620e3165c9b240593960a108c25ab16dfcd723737ac6863559b0e64
font_01_sfnt_off00007a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A88 2052 bytes
SHA-256: 921b17cebf27161a3a6130e27837bef85d37792b87f1bb497a8066080b67046e
font_02_sfnt_off0000833e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x833E 10504 bytes
SHA-256: 32d4ea216eab2a0f09105f78b2965063d569c842e1a31740a05ea2b578870bd6
font_03_sfnt_off0000a759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA759 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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