Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4f85b5ef4bf621…

MALICIOUS

PDF

40.1 KB Created: 2020-10-28 18:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5a19c58e878f987a90f0fdf5f008f147 SHA-1: 2c28abddae57f10abaf758f934f3148761e05ded SHA-256: 8e4f85b5ef4bf621284255c23b34cf32255093e5a45fb66bbf4566d2666519b7
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded URLs suggest a tactic of creating a large link farm, potentially for SEO manipulation or to distribute further malicious content. The primary malicious URL identified is https://cctraff.ru/aws?keyword=flow+free+answers+extreme+pack+12x12+level+16.

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://cctraff.ru/aws?keyword=flow+free+answers+extreme+pack+12x12+level+16 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulozor/quimica_fisica_atkins_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff414644-a86c-4f35-bfb4-45433c2c0c10/58931426618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2022/5176/files/hindu_purana_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/tratamiento_del_absceso_cerebral.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/54337421764.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/cognitive_behavioural_therapy_for_ocd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9d98eb-0b34-4e32-a7e3-afc3e441aa61/botefukidetitimav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ecead4-307e-4b96-8d24-826caca198bc/riders_of_icarus_wizard_talent_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/fifuzemez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c632b18-7a6f-4c30-a866-850704019f2e/34875044459.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/55726870430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7973/8567/files/bipaxosebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/1642034894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b07dc32-7128-4a06-abc9-50c29521619c/guzaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/60054027838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073dea69-f04c-41aa-b409-1eb622e46c35/29358000495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70fa345d-57f3-488d-a797-7e4507fe1be6/juwixubilef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d790b1ff-7a97-40ed-aa19-115495282f18/wegim.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/jodopagozor.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/49118619910.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/taxonomy_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/fekefunurunebori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5276/7131/files/apush_chapter_8_outline.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/34026941556.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_off00005897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5897 5736 bytes
SHA-256: ef1e848cb217dbf7964854ddbaf92babc7f5e19f7bfe5c8a5179f6a0e133f3df
font_01_sfnt_off00006c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 10712 bytes
SHA-256: c460302fb95befb69c9e72ecc948de0f27fbcb59a2d195aaf92a9d575655d4a8

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