Malicious PDF — malware analysis report

Static analysis result for SHA-256 7719b60b37e6c9d6…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 22:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d3db5a9a1d609b202edbb6e856351ec SHA-1: fcf5b7579eb5254808f943812dd0c381455742d2 SHA-256: 7719b60b37e6c9d67b693fff4f2dab7c3a8d338be726125a89c7d7fe9c92bd49
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to the same URL and a large number of other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely spearphishing attachment, leading users to malicious sites.

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/pify?keyword=stormtrooper+helmet+template+pdf
    • http://xaxebikoj.vanessakeel.com/uploads/1/3/0/7/130739678/2905936.pdf
    • http://files.cebtechnology.net/uploads/1/3/1/3/131379594/dikexe.pdf
    • http://files.shesinspired.com/uploads/1/3/2/6/132695832/d81f9254.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/50914188751.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/lokoronaxowiso.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/18043256039.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/assinatura_digital_documentos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/juruvowurevudadep.pdf
    • https://cdn.shopify.com/s/files/1/0429/3672/9766/files/1837672091.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/zilerewazowovuvagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/nurifitade.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/pa_driver_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0451/7996/1495/files/basic_pcr_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/famekizejonaxapalisom.pdf
    • http://goo.gl/MAqWWV
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e68.bin
42ba03c977ab4b366e4e16907ca99cb32dcb3bbd6492ac410ef201eff4a98da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 4804 bytes
font_01_sfnt_off00006f1b.bin
59aa9ee552bb95e090985183cbc6a452b4a476c8bb1eb6f55d326e37aa1a2c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 5208 bytes
font_02_sfnt_off000080a7.bin
d9e0f29cb0b06b0dd1e9e3059f5a4bfb87213236904879c42c9912fab9b739c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10024 bytes

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