Malicious PDF — malware analysis report

Static analysis result for SHA-256 40601839f9d2612b…

MALICIOUS

PDF

44.9 KB Created: 2020-10-15 13:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6569c9e180fbdf65bdbada8713af0eb5 SHA-1: f228d5e9b16d7be89b8de829174640942a6f47c3 SHA-256: 40601839f9d2612b90d553bdad6f238b3eb823868af873f354dd09ed43ff56ed
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/123?keyword=celula+eucariota+sus+partes+y+funciones+pdf In PDF document text
    • https://site-1043438.mozfiles.com/files/1043438/joxujopujuselogobatu.pdfIn PDF document text
    • https://site-1048186.mozfiles.com/files/1048186/33789250453.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/xalarelolavibamazagezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f87194822e65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f873df5a5a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f871120bb947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f876761850e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87348ca4ecc.pdfIn PDF document text
    • https://site-1042343.mozfiles.com/files/1042343/55761144160.pdfIn PDF document text
    • https://site-1039224.mozfiles.com/files/1039224/57092892600.pdfIn PDF document text
    • https://site-1040399.mozfiles.com/files/1040399/2966227070.pdfIn PDF document text
    • https://site-1043572.mozfiles.com/files/1043572/xofizusorak.pdfIn PDF document text
    • https://site-1043694.mozfiles.com/files/1043694/zonaxosobubogatu.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/1/0266/8252/3834/files/modern_architecture_a_critical_history_by_kenneth_frampton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0996/4694/files/how_to_determine_end_behavior_with_leading_coefficient.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64dfa5c6-c25f-4afe-898f-4536b0581f93/rotonuzuwuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b59639f-44a3-436b-9bfa-770179802334/15574231013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aec7c9b-ac67-4b9f-b886-fad78cb75829/85567575462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03c5f82-58c3-4f9a-8547-77763a34f846/zipikagolijer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/quick_and_garran_annotated_constitution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/1832/2839/files/real_time_labs_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/46703643706.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_off00007035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7035 5156 bytes
SHA-256: 70b6d097d3e83427d2a93cce79d15be3eaa823aa466e50edf702289884faf1fc
font_01_sfnt_off000081d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D3 10696 bytes
SHA-256: 22c6a5f50de83e1279b24c47887ceb36321a9502093f06d63046c5f728a58f98

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