Malicious PDF — malware analysis report

Static analysis result for SHA-256 5008dc2f7a827c79…

MALICIOUS

PDF

33.2 KB Created: 2020-08-14 17:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae6c0225e8c98fdc50493f26038eb266 SHA-1: 91c6eba6ff6ed3e2702e53d032b14ebe2f39d09a SHA-256: 5008dc2f7a827c79493e7af916b464bcf9334a613fe1975e1b1d8bb3039ccd30
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=belleville+high+school+nj+uniforms', is flagged as a malicious redirector. The presence of numerous links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute content through a large number of seemingly benign URLs, with at least one leading to malicious infrastructure.

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.
  • 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.
  • 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=belleville+high+school+nj+uniforms
    • http://zajifegov.davidfunkpainting.com/uploads/1/3/0/9/130969953/4115126.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/menigovotifosoriwibenapo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/53003793741.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/modern_art_history_timeline.pdf
    • https://cdn.shopify.com/s/files/1/0428/6247/7479/files/adiabatic_demagnetization_of_paramagnetic_salts.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/88656477604.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/90383412926.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/present_indefinite_tense_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/59175272355.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/polugadew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/21455483019.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6537/files/vivipasifatotevabutovodid.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_off0000458d.bin
a34e8eb104c13e5d261f1b7ce75685026f0129fd438390e4876baa1800c59a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x458D 5272 bytes
font_01_sfnt_off0000575c.bin
2c1e6901a2c38f3e4355feb32bf3dbd6d992c92015f0846dab9f56666b1d71b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575C 9624 bytes

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