Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a2d01b2a681217…

MALICIOUS

PDF

44.1 KB Created: 2020-10-14 16:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 362010b2ffd3c9a6f06684d9545ed51d SHA-1: 23fe35c9ac0c3d408488b5bda7650ae7d9fa7401 SHA-256: 20a2d01b2a681217983818eece611c20bd17bbc38f22090daa3b726926da0080
124 Risk Score

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://gettraff.ru/strik?keyword=best+battery+analyzer+app+android In PDF document text
    • https://site-1043603.mozfiles.com/files/1043603/65667270526.pdfIn PDF document text
    • https://site-1040512.mozfiles.com/files/1040512/55358393118.pdfIn PDF document text
    • https://site-1041587.mozfiles.com/files/1041587/76323098976.pdfIn PDF document text
    • https://site-1039356.mozfiles.com/files/1039356/9619539403.pdfIn PDF document text
    • https://site-1043259.mozfiles.com/files/1043259/punonidi.pdfIn PDF document text
    • https://site-1038694.mozfiles.com/files/1038694/lekabam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f63ed3962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f86fa109f235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8702e328285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86f42213348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f86f96b3295d.pdfIn PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/wedaxawutakekulabunadowip.pdfIn PDF document text
    • https://site-1039173.mozfiles.com/files/1039173/50457681293.pdfIn PDF document text
    • https://site-1038548.mozfiles.com/files/1038548/87780825689.pdfIn PDF document text
    • https://site-1041854.mozfiles.com/files/1041854/95157825994.pdfIn PDF document text
    • https://site-1038852.mozfiles.com/files/1038852/zorepivovogeba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68769de-c55c-4d2b-a44c-c6910f9b0557/64478379836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7720/0797/files/bonfire_of_the_vanities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1194/7926/files/61528697597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6088/7203/files/what_a_plant_knows_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0279/2616/files/moment_of_inertia_of_circle_with_respect_to_its_tangent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3784/files/55030353338.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 5292 bytes
SHA-256: a0cc59576b4c37dd5a3b7365523ed6ca049754c19f498357d66370ba8646ff20
font_01_sfnt_off00007fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB8 10348 bytes
SHA-256: 58e2bd5ee7646d66459bbb6e9daa66d55760d3530b7c2c91ad60d10dde187adc

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