Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e2efa17646c388…

MALICIOUS

PDF

36.7 KB Created: 2020-08-15 19:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a83f60653c1f5db2640620a0005f3c08 SHA-1: d6a1a0649050e50f8554b2fa3559daea2e2c35be SHA-256: a5e2efa17646c3885a527c961f59d626ab89a4d5f16da403c1e2348bf855de69
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains this URL and other links pointing to potentially benign Shopify domains, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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/wb?keyword=gopro%20fusion%20manual%20update
    • http://rejaz.fromsistertosister.com/uploads/1/3/1/4/131407995/8306363.pdf
    • http://files.omanroadshow.com/uploads/1/3/0/7/130776841/kasulojemuv.pdf
    • http://files.sacredsecretskincare.org/uploads/1/3/0/7/130776366/9375199.pdf
    • http://gopume.chimtechllc.com/uploads/1/3/2/7/132741144/vitipaxepabumega.pdf
    • http://wisumeb.golfcaroutlet.com/uploads/1/3/0/8/130814297/jufixonox.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/final_fantasy_tactics_gba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/9872159303.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/steam_calorimetry.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2193/files/electronics_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0443/9402/1030/files/koxominuro.pdf
    • https://cdn.shopify.com/s/files/1/0434/4627/2162/files/quantitative_analysis_for_management_10th_edition.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_off00005158.bin
83d06bdc74c100517835d4f88bc51c8bc4ba169f9c0e541cf3d4ad6c0392961b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5158 5220 bytes
font_01_sfnt_off00006301.bin
39fba9ed0df272ed576b1d94bc1a450360477e26d4e4eb5c3b415b7c137e716c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 10340 bytes

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