Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fa3115356fa005…

MALICIOUS

PDF

52.5 KB Created: 2020-10-08 08:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0f175d497ef78a91c4a81357a6e04203 SHA-1: 78145fb73d8a2b1ee5a1111e21400ba1c662d2ba SHA-256: b9fa3115356fa0051f2751d791d8928a3870419d781641aa72f2f82076f923c5
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=alfabeto+ruso+traducido+al+espa%25C3%25B1ol+pdf In PDF document text
    • https://site-1043763.mozfiles.com/files/1043763/zirofuponidafepetuxo.pdfIn PDF document text
    • https://site-1036716.mozfiles.com/files/1036716/bonisakowa.pdfIn PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/30944809738.pdfIn PDF document text
    • http://files.yellowhouseherbs.com/uploads/1/3/0/9/130969160/53561dbf7b.pdfIn PDF document text
    • http://files.gypsies77.com/uploads/1/3/2/7/132740277/23a5c79e41.pdfIn PDF document text
    • http://files.fraeuleinb.com/uploads/1/3/0/8/130813330/3980197.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/6c29f0f2-2379-4726-b42d-71e1d232a0dd/memezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe07dfb-e248-4633-9a5e-18add888664d/77136710434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9017/4886/files/nisixapaforuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7379/3948/files/lusivam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2461/9936/files/87413883406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6340/0861/files/54850266753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4079/5545/files/maranatha_bible_camp_covid.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_off000070f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5492 bytes
SHA-256: 447af7bb01a2a9e2def951963dd4033119f0cac45beb6a42e8839b8551220999
font_01_sfnt_off0000836a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836A 21784 bytes
SHA-256: 8f03c59543431facef4ff192a94e469327f90015773dd553a628700bfc951b9a

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