Malicious PDF — malware analysis report

Static analysis result for SHA-256 349766a24e91528f…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 23:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 348cd5cfd01cc608ca167779b613d656 SHA-1: f662f5f5d7e77f7184a0e8c1b3183414bd28c3ba SHA-256: 349766a24e91528fbb53a01e3314dfe39f21f7aea74a9485e126267dbb13f975
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains this URL, along with numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is likely used to redirect users to a malicious site or download further malware.

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.com/wb?keyword=catalogo%20truper%202018%20pdf%20con%20precios%20descargar
    • http://files.wazzuor.com/uploads/1/3/0/7/130775753/lakikujaxodezova.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/belotujojipepufutazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/xegizobigoxawet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8439/files/ayurvedic_yoga_therapy_mukunda_stiles.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/expanding_tactics_for_listening_third_edition_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/zavekifijezevug.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/refam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/sodofidun.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/mebuxujasosenised.pdf
    • https://cdn.shopify.com/s/files/1/0438/3142/7234/files/25700199743.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/66902918651.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/psp_vide_converter.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/nutricion_enteral_y_parenteral_arenas.pdf
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/employment_news_october.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d6e.bin
31bc858a45c6636fdd8b7f89c00fe16ea114be95ae1c3c84e6d5dc05025ea145
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6E 5748 bytes
font_01_sfnt_off0000611b.bin
53e3f77ef94d177259c887c6869c310f8b695f4c7d9d970aedd0c32b48f6475e
pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 15528 bytes