Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb7f0caf58b1086…

MALICIOUS

PDF

39.2 KB Created: 2020-10-03 13:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2049ba14dee1e2f83c47b92edd79d2b6 SHA-1: 33e3f0e27a51c6c154e1f676b8a830509c0448c4 SHA-256: 9cb7f0caf58b1086af8a35913703dfe50400a7a46990a6e027c1775a6e43d9bb
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.me/pify?keyword=best+buy+kegerator+2+tap In PDF document text
    • http://files.lampsfromtheattic.com/uploads/1/3/1/4/131406827/jiwifesazus.pdfIn PDF document text
    • http://files.robcastellano.com/uploads/1/3/1/0/131070618/2660365.pdfIn PDF document text
    • http://files.keithdowniepaintings.com/uploads/1/3/1/6/131606343/a8add.pdfIn PDF document text
    • https://site-1038783.mozfiles.com/files/1038783/zitoradozanoda.pdfIn PDF document text
    • https://site-1042343.mozfiles.com/files/1042343/83212382841.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/seritapujuzo.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/bodosatugarufut.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/607ff604-4b90-4068-ade8-a4e0e048dd5f/javidopixoxujiter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9651487-936c-4b4e-8cad-c53d603858bf/99469940307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8f96a6-cc41-4978-8952-9d1da77169b5/wazusigavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031b7dd1-50f8-4813-9b08-4e1e5c57b2e5/kutufoludajobila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558746ac-1109-4d8c-a298-02ffa05b85a7/45382079194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b021cb-bcd5-4e98-b92b-9b249da3739e/34920150316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091951b4-a69b-44cb-b53c-bcd6f658accf/milemiresomub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3fecf6-8f89-4318-a04c-2d258b347765/32028025495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb3c868-03f6-445d-a26b-ce726afed4c5/fumasesu.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_off00005a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A98 5440 bytes
SHA-256: eb7ad206bd3fef0f8cd8bdf6cc7e7df29593ce4381cc6a8ffe1116cb5beb4b5d
font_01_sfnt_off00006d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 10240 bytes
SHA-256: 41e86dc48cac2808cf634577ac0c23bc4311268c83d089ed28bf88fd7cb4b77e

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