Malicious PDF — malware analysis report

Static analysis result for SHA-256 749239ce894253e4…

MALICIOUS

PDF

55.1 KB Created: 2020-08-01 18:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ad78cf254600bef602899cd029ec5e SHA-1: a2ea1ca1821ab61e08a3522f056ab5806b07a5a4 SHA-256: 749239ce894253e44345aa5898b37a0e0d71e035a074192ed793260e5d3d7a4d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=97+ford+taurus'. The document body, though heavily obfuscated, contains references to car models and the authoring application, which are likely lures. The ML classifier strongly indicated maliciousness.

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/pify?keyword=97+ford+taurus
    • http://files.minhquando.com/uploads/1/3/1/3/131398253/gifaro_kavezobolafejo_pipamev_morufofeg.pdf
    • http://files.churchonthecreek.org/uploads/1/3/0/8/130874526/8891060.pdf
    • http://files.makealltimetreasures.org/uploads/1/3/1/3/131379801/1218914.pdf
    • http://files.christthehealer.org/uploads/1/3/1/4/131410870/jovunedolonufa.pdf
    • http://files.susannahcorrington.com/uploads/1/3/1/3/131383838/c07345c63e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/john_deere_la130.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74195332560.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/19793734754.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6572/files/86452586623.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/danariwixuguxituzikevosub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/wadexovefewopixejuwiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0434/8323/4470/files/60173083655.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/69593545768.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/pivedon.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3104/files/53097567507.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/jaxesutujajufofirog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/dekogivemofuwipukego.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000998a.bin
7c52df41fe270f10c43f607ddf820f60099bac6749fab2ec62a6c738e5e47adf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998A 5012 bytes
font_01_sfnt_off0000aaa5.bin
3851498545663d8b98362b2218504e38ec5d7cd4c654952b921966fefc62cfe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA5 10728 bytes

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