Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdd3d93e9273589…

MALICIOUS

PDF

40.0 KB Created: 2020-10-04 05:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ccbc121fca368302528a5daf967d2e86 SHA-1: e627a89b99e25e3bd5d77adf9d57c85bc26ab0f5 SHA-256: 9cdd3d93e92735892e0e79bf57b1aec1de7f31213131313c7bc9508c396384c2
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=cambridge+igcse+core+english+as+a+second+language+coursebook+pdf In PDF document text
    • https://site-1040668.mozfiles.com/files/1040668/75842446496.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/51769554654.pdfIn PDF document text
    • https://site-1039493.mozfiles.com/files/1039493/worakivubemuvo.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/15747899928.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/97528037419.pdfIn PDF document text
    • http://files.nicolaanne.com/uploads/1/3/2/6/132680874/joxadalifufagapogali.pdfIn PDF document text
    • http://files.premierpoolnaples.com/uploads/1/3/1/4/131437750/83bc92e8692c20b.pdfIn PDF document text
    • http://lobezup.eccentricpersonas.com/uploads/1/3/2/6/132682866/xadew_wimojomidika.pdfIn PDF document text
    • http://vonisega.growinggorillas.org/uploads/1/3/2/8/132814975/vigenawewasaxuk.pdfIn PDF document text
    • http://vedopido.crowncharlotte.org/uploads/1/3/1/4/131408100/lixiloxizamusegi.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/6a700128-2a47-4981-9bee-cff2ec555a4f/nitafora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c46f6d5-b6e6-4cd7-a6de-5006485c664f/doxozolomobedakikefadida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fad47f-c63e-4c28-93ec-447d4f3eaf5c/nazujejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33929bd-4239-4c12-8d1b-54aeb6cdc591/87455411133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533b1404-c957-44b7-9dca-ba2bcd644298/padoluluzedukofuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ffcd72-0f55-4dc9-ba62-7752b14ecd3b/fozupifagofomapexisex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea45cec-072c-46e3-b2b1-f1ead1b8c94b/89984652026.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_off00005a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A85 5680 bytes
SHA-256: eb7b3fac990257caa1801e283a970d2933713ef76d4d36952aa74a432912554d
font_01_sfnt_off00006d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9B 10780 bytes
SHA-256: ed9a26f9c04be6c2cecb1472e176e9dfaf5f9d5977242581e5288b4b81be0019

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