Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e9286caa83a8cf…

MALICIOUS

PDF

49.0 KB Created: 2020-07-29 05:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f8bc774c4e1d9c810f586e7e3c172ef SHA-1: c46541134eaac3ed96e84f60c15e94fd27ef662c SHA-256: 73e9286caa83a8cfc595642238107b520b5bb8bbc30782b8c6d65379bff033a3
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to horse fly sheets. The presence of numerous links and a malicious redirector suggests an attempt to drive traffic to potentially harmful content, likely as part of a link farm or SEO manipulation scheme.

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=lightweight+fly+sheets+for+horses
    • http://files.aelc.org/uploads/1/3/0/7/130775672/lagujumejunesof.pdf
    • http://files.maireadstaffordartist.com/uploads/1/3/0/9/130968942/kezevigebaluvakoja.pdf
    • http://files.agathafashion.shop/uploads/1/3/0/9/130969375/9654079.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/suzikezunurolabar.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/96966842851.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/jojevoxutam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/doxokupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/45906909729.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/16508489871.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/28709670971.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/vegusilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/25803138625.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/86747344145.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/xaxegujuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/52520211409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nipexaledova.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_off00008431.bin
60561440c31e76dd1ec52aa1e388bfbfedd26002c49c08ad37b31372290531ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8431 4636 bytes
font_01_sfnt_off00009429.bin
c23225a4dbc856dbca2327ca2e462a8844d6ef6a4370d5e3c30c5f8f031c9434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9429 10164 bytes

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