Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205b820a478d113…

MALICIOUS

PDF

44.2 KB Created: 2020-10-26 02:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b271d400c3c6e6d70cabdc5209c2741e SHA-1: 841ae37a58e3b4c46acd5dbde3c24c29b26234f0 SHA-256: 8205b820a478d113d05feed35a903ea3b4680b781a521ae679572395f9c5b2cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://ggtraff.ru/strik?keyword=witcher+3+bow+or+not, is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous links pointing to S3 buckets, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly indicates malicious intent.

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 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.
  • 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://ggtraff.ru/strik?keyword=witcher+3+bow+or+not In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5f8f1d84c0a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f8e1a7d3fcf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f86f48e42bca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f872a6dded6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f87d26f11de7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/fawamokogutovuni.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/marathi_story_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/xubuzidazagaganobudi.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/toa_120_watt_amplifier.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/vagelujufus.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/buganda_agreement_1900.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/riesgo_biologico_laboral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427196e0-274d-4098-b71c-59efcc683f82/cen_tech_90899_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd1fe8f-ba58-4cc3-b0fa-939f42af4dde/caracteristicas_del_modernismo_poetico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6c6fcd-478d-446c-8901-5c4a54e2d3cb/vetilorawoninepureg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e6de4e-73e1-4447-b36b-e57c14b1eee3/best_mini_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3cb411-0ecb-4e6d-8ab3-aafd355ea4e4/kigawisimufejuxesufusuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1725/2249/files/dufujokoxowipip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1714/0927/files/sharepoint_online_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3841/1422/files/community_medicine_park_24th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1682/7292/files/2020_honda_pilot_lx_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f9349e4-5510-4711-b1c9-721b8bc75fbb/fulumagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48685ff8-7a79-43c6-a3b1-13ac8c456352/f_table_0.005.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_off0000702f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702F 4876 bytes
SHA-256: 25ea134d73ce1b3c467c4900834d878cb21b8320b1426e0cce9e09c8a60ed188
font_01_sfnt_off000080d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D9 10148 bytes
SHA-256: b25488fa506121d7f743402472317870b46b518c9ed8cb3a4c617e9aa4b28c2a