Malicious PDF — malware analysis report

Static analysis result for SHA-256 7714d7215c8a2c0b…

MALICIOUS

PDF

51.2 KB Created: 2020-10-27 13:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 54c223e49358a373dedb70ec4c195d64 SHA-1: 1da5dd49676114d310d2d3d25fd7e8ce2d131a21 SHA-256: 7714d7215c8a2c0b61ef730db51184a4afa6798cf18c03fa026a564234007534
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=the+silent+language+of+leaders+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f8babbd081f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f92585cb799d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_5f969cc3a3895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_5f97289935b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f97d96051c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f919b291ebee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f96204b389ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f8ba6a60ab37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f96cb7d5ce18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8bea9c9e332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f92689dd1c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5f96c19a1bf53.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/josamodaxulep.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/govodijix_jarelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f923da04e132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8839c2388ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87182dd68a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f949d6663987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f91e982dce28.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://cdn.shopify.com/s/files/1/0497/3897/3345/files/22104895645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/manual_honda_cbx_250_twister_2020.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_off00007c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C76 5136 bytes
SHA-256: e368da6437726289fd67ed7a90a7e9937af1aac480da60c8037199d423729240
font_01_sfnt_off00008ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDF 10368 bytes
SHA-256: f920ddd2a1c892d23ba10a0f18c9505cf2f9a82bfe7e626d89b260585e7f8e7e
font_02_sfnt_off0000b14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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