Malicious PDF — malware analysis report

Static analysis result for SHA-256 405478f713ca3ef3…

MALICIOUS

PDF

47.1 KB Created: 2020-10-06 08:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 46525d0de11f3bc43243f59e87f077e4 SHA-1: e0706ce6804a4022e2f7207a039bcac7c3668cf5 SHA-256: 405478f713ca3ef3b0bb36fc4a16d4943eb4b094fb86707f4b7a3458caa29278
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://gettraff.ru/strik?keyword=familia+araucariaceae+pdf In PDF document text
    • http://nojer.ericmarillier.com/uploads/1/3/0/7/130739416/tajovolowazokab.pdfIn PDF document text
    • http://xejox.mrsberthaosclassroom.com/uploads/1/3/1/6/131606490/8529186.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/vupiroz.pdfIn PDF document text
    • https://site-1042504.mozfiles.com/files/1042504/18126102608.pdfIn PDF document text
    • https://site-1043324.mozfiles.com/files/1043324/juguba.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/sejevuduso.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/63120263262.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/14336117668.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/35891346959.pdfIn PDF document text
    • https://site-1038541.mozfiles.com/files/1038541/vegupugerotejij.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://uploads.strikinglycdn.com/files/ef093c5f-cd2f-493a-866d-72713d4fc4f9/filarifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78ca98f-e33d-4573-b01e-b138a90399dc/2397948913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72aae3ef-23e9-4d22-809e-21274fa00eab/19942432325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a90434-ce9a-46bb-abd9-d9a8290e2eeb/demuwetesalajenoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97021e8e-0d55-4336-8c29-d10114db43ce/31367015827.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 4664 bytes
SHA-256: 5f09515d14431134a3c975d8d0957454e442a098442c405027b9f46f28b5e72e
font_01_sfnt_off0000769d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769D 1716 bytes
SHA-256: b744d20329a21ba1921c870a4deaacb4064f710d75eb1a58e31c0067c31195cd
font_02_sfnt_off00007f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F42 9908 bytes
SHA-256: 61f2544477ecaedbe35e1ebe706163336ae811309f9da0061912f62f0bb1bde6
font_03_sfnt_off0000a129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA129 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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