Malicious PDF — malware analysis report

Static analysis result for SHA-256 e784a0731cfb6418…

MALICIOUS

PDF

46.6 KB Created: 2020-11-02 09:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 244b568c273154ca3d275c37c3d5206b SHA-1: dee36423bed8cad819876b6f993cbc4d86a79dac SHA-256: e784a0731cfb6418e0f45023afc648434c858b466e58e06bf0acad0576d8b644
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://ttraff.ru/123?keyword=opinion+writing+for+kids+graphic+organizer In PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/kofafasi.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/280b7d4a6752.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/1/0508/1851/5129/files/geometry_word_problems_solver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6251/5643/files/johnny_cage_mortal_kombat_11_age.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7010/9890/files/embroidery_stitches_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/cancer_de_prostata_articulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b7cb71-56ce-448b-a28e-8c3bb323aa1d/52395381665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6631/3886/files/14882580422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89dc10b-2469-4c91-ac78-7aed05688c1f/95204891323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9624/1856/files/badexulinud.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_off00006a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4B 5408 bytes
SHA-256: f153b62dddd6e40ab36c3a301a5ebe532e48eaceb0af922be621a54361b7973b
font_01_sfnt_off00007cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC3 9972 bytes
SHA-256: 6ab9481979572676938915f75d21d13c86cb6afb14e47563b7ba713408606f87
font_02_sfnt_off00009efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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