Malicious PDF — malware analysis report

Static analysis result for SHA-256 b906226e6876a269…

MALICIOUS

PDF

51.6 KB Created: 2020-10-15 04:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fc5aaa5abefc4883e8d37fb8d917e85e SHA-1: 408471ec6d10331ccd6b61355f6e52ad22921d1f SHA-256: b906226e6876a2691cee59beba229fa4912367a7061b6a3e4cfc7d3f1006095b
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=social+cultural+anthropology+pdf In PDF document text
    • https://site-1038422.mozfiles.com/files/1038422/domurene.pdfIn PDF document text
    • https://site-1040775.mozfiles.com/files/1040775/biwumaxazalasumekukukoj.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/tafumexotomudi.pdfIn PDF document text
    • https://site-1039341.mozfiles.com/files/1039341/xewij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f870bc5880b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f87166a8d2b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f87715a6f7fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f86ffb923801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f870bb21cee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f871f1649e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87a3e74c3e3.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/cf499d49-b1c1-4126-933b-0a1179afdd3b/nepofel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb4d2c1-71fc-4138-b56e-ffb7a9a4ad68/wazosamofusizobedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e31a1c-4190-41e7-9f34-99041ca76b15/nubarebuwugenok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b5b513-395e-48ab-9965-8b8635be237f/66978217727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91a5649-1df2-46c6-8edb-91d06b3dc273/poxusamafadijaletapupume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b9e926-02d1-435a-b4e1-8edfe0c1922c/94512543618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc28fa9d-c91b-4fca-a168-2d36ab107d81/xejiraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94aeec8e-1f7e-45c3-ae0c-a09513f549ea/77908476143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0078/5828/files/subaru_levorg_manual_swap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7060/9312/files/th_7_base_anti_dragon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8650/3324/files/how_to_factory_reset_asus_laptop_from_startup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/61893303185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8897/4502/files/54692258653.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_off00007d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D25 5208 bytes
SHA-256: 0037c7c60acbed4a39e9149bfe339c79a1e66337e7ac76ea45369846f33abdb3
font_01_sfnt_off00008ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBC 10748 bytes
SHA-256: d9a6fa9968657788878e34a47c2ff484525ffd9e7878242769a761d044371578
font_02_sfnt_off0000b2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3