Malicious PDF — malware analysis report

Static analysis result for SHA-256 46caf35709370f91…

MALICIOUS

PDF

40.7 KB Created: 2020-10-01 07:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1b7610ff9a86ef3ed2e61c3f9775869b SHA-1: a86b3f3978df2aecd6e1bf25ec46e0ffef915f73 SHA-256: 46caf35709370f9110fd51eb66628d4912438300c8655e4aea9c5b1daf1a7529
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=prognosis+anemia+defisiensi+besi+pdf In PDF document text
    • http://mekapeb.citysailorfishcreek.com/uploads/1/3/1/8/131856333/8cc4c4c8.pdfIn PDF document text
    • http://files.afbrewco.com/uploads/1/3/2/6/132681579/38ee2.pdfIn PDF document text
    • http://files.drchrisphillips.com/uploads/1/3/2/6/132681378/govuxutos.pdfIn PDF document text
    • http://dojipubez.neededmag.com/uploads/1/3/0/9/130969352/9a36f2aec0ac72a.pdfIn PDF document text
    • http://files.designetchingandawards.com/uploads/1/3/0/7/130738662/rugavozu.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/63673252818.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/gimojoma.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/83464529856.pdfIn PDF document text
    • https://site-1037866.mozfiles.com/files/1037866/riwebefifudenizevugemol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2295/6197/files/tugazotugigen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/letras_de_canciones_para_guitarra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9172aa71-89b1-44ad-8f41-adf37190ab3b/sedago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f087082c-46c8-4119-b0de-f0fc5c18be74/valudotesiroveteluzig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9198b47f-3efb-49eb-a830-388b3566cc94/bonef.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_off00006139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 5468 bytes
SHA-256: cdc3b67345575fb52acc6b5e0d7e8181cf2159a03fa3851e674eeb85d6372035
font_01_sfnt_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 10136 bytes
SHA-256: 3808c9b485ab9aac37297687394534c70037e2f153e77a23a42e26c381f86200

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