Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f58d6470a660670…

MALICIOUS

PDF

36.9 KB Created: 2020-10-26 11:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d31eeba0cdbda0696d2761a512f7b6e0 SHA-1: d40369e5e84c8e8a2e8fc4c1cb5469ace65bcf77 SHA-256: 9f58d6470a6606702832340359a8b6688799889c2d87d4bf97653fcf4bbfb5cc
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 3

  • 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.
  • 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.link/123?keyword=quimica+analitica+cuantitativa+underwood+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f89089fa8726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f886c94300b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f8d16ffad86b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f8bc83013eb9.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/wilugugo/wesafonokizatosagijurokop.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/canada_food_guide_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/list_of_important_days_in_india_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/zufofovikaduzananused.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1335/6194/files/text_your_ex_back.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/disposable_digital_camera_cvs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/maduful.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/multilingualism_open_university.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/primeiras_aulas_de_violo.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/bhagavad_gita_chapter_12_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4348/3559/files/jacket_crown_preparation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/13348842625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/naxososavoxosijasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d767c418-931e-48b6-9e59-9443e3f36ee7/el_demonio_de_nen_on-line_subtitula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377209ae-d518-420f-9708-2ba7d13d1e27/83233158199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2790c8c0-c628-4b2d-b905-5c8ec3981792/77088512064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40be96e-7c58-4202-be9d-6b59a5c3a230/xaxavutu.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_off000050ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50ED 5336 bytes
SHA-256: 5327ac8aa8c277ef32804b8237bc1de3476ecb28e19b431c2bd9292c6c08aeee
font_01_sfnt_off00006310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 10612 bytes
SHA-256: d6113c82d76606f915e664bf33ccb9a1110f641c02ec329a593dac4e09b9c049

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