Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a449c96cd26a0d7…

MALICIOUS

PDF

47.1 KB Created: 2020-10-10 22:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ed0d437ab13befd79cb9611cb56c6327 SHA-1: 80a092838d619154ac819b7a609bf94fa5fcd79e SHA-256: 7a449c96cd26a0d79691a6d7ee6126ae81b520d71445fc74ec1a224ae7db8219
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.link/pify?keyword=gre+official+guide+pdf+ets In PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/74668106046.pdfIn PDF document text
    • http://files.jrtiautotech.com/uploads/1/3/0/7/130738553/jakuvuzotike_parolufadol.pdfIn PDF document text
    • http://files.auntbebotanicals.com/uploads/1/3/0/7/130740255/2876b9.pdfIn PDF document text
    • http://rabukesut.huningtonchase.org/uploads/1/3/1/6/131606490/4106071.pdfIn PDF document text
    • http://files.vinesbakery.com/uploads/1/3/0/7/130739601/b22887aaa6e9.pdfIn PDF document text
    • http://files.huemine.com/uploads/1/3/0/9/130969700/xejolufovab.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/3cd40426-e411-46d4-bd19-ca55c1817fdb/34661568656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb1f92c-29e6-4d1f-a435-e5f1cf1803e2/4461867578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9670d498-9453-48eb-ad97-0f24ab902e2c/jefonifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a5a61f-3f45-45d2-a168-78cbcee6e8dc/mofabov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076efb75-12d3-42d1-a14a-61c6a30c4aa8/32289905132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8896/0416/files/72662123068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/rijutawugezugoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5490/2677/files/lusobujiximatesaxajuzowe.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_off000077fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FC 5352 bytes
SHA-256: 98b89ceb3cbf47a7515b5363381410abb7c51d7932876c94f58a5b03cb373901
font_01_sfnt_off00008a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 10960 bytes
SHA-256: 9c889843b6de0092a81ee019a3155e3fa2296ce7a775adec5e68330864af37c4

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