Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1772dd327650b9…

MALICIOUS

PDF

49.5 KB Created: 2020-10-15 17:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 316c8de28e004d9c00848bf6c84ed277 SHA-1: 406ef2f505ec8109086a62073022d88e15b25344 SHA-256: 0b1772dd327650b9badbf03bf660f922feaaa398c6552db1a58eaea53ba01725
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/123?keyword=cours+fran%25C3%25A7ais+masculin+f%25C3%25A9minin+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f88288442074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f87ec0a73004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f872dc262cda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f87e57646d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8835fe79d34.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/6078185807.pdfIn PDF document text
    • https://site-1038604.mozfiles.com/files/1038604/37831626959.pdfIn PDF document text
    • https://site-1038717.mozfiles.com/files/1038717/kanubegujimugixilusigo.pdfIn PDF document text
    • https://site-1037024.mozfiles.com/files/1037024/bulabaduwenamukutebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f87b77bf30e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f877925cefae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8767f740877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f8709ac5b90c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f87022a017d2.pdfIn PDF document text
    • https://site-1042279.mozfiles.com/files/1042279/soxenomasogorovoke.pdfIn PDF document text
    • https://site-1038606.mozfiles.com/files/1038606/peguzagasimafizenegufage.pdfIn PDF document text
    • https://site-1041384.mozfiles.com/files/1041384/sibuviwuwapako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/69efe214-8a15-4542-8189-c3ed0022514f/71238367875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eeae7b5-0522-4dbf-b21b-bbe8740470b2/tawisake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbaa840-dfbb-41eb-a23e-b6bbf86cb7bc/jiwix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/biwaramope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8601/5389/files/irish_english_pop_culture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7127/7722/files/land_diaper_bag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3E 5332 bytes
SHA-256: dbee4000c82ee68447435fdf0ee4169084b5e07f498e54656e684c71849d6296
font_01_sfnt_off000080fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 12524 bytes
SHA-256: 032801b8f8b59350334103d7edf355828bb06d545c8f2a768ca924fe962bab14
font_02_sfnt_off0000a804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA804 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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