Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe3880a28f6dc10…

MALICIOUS

PDF

37.6 KB Created: 2020-08-24 05:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2abdbd93939e09d8301e687f5c89f47 SHA-1: 96e5a508ed85d6b7d4708ed4f77ab6639415f3ec SHA-256: 8fe3880a28f6dc10910e0bca5c5e7f907ac7128662ed0209b58728ce04bc5d09
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and references to sheet music, suggesting a lure. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine visibility for malicious 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/pify?keyword=jarabe+tapatio+sheet+music
    • http://files.legato.ca/uploads/1/3/0/8/130814216/db414e09e307.pdf
    • http://mekapur.sabahmethodist.org/uploads/1/3/1/3/131398020/lesapeporezumib.pdf
    • http://files.alyssamichele.com/uploads/1/3/0/7/130776745/eed7ccac46.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/rajixuweniluwubinatevow.pdf
    • https://cdn.shopify.com/s/files/1/0430/6747/4087/files/calorimetry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6099/3943/files/plex_optimized_versions.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/75164650424.pdf
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/zesaxowaguzeguniwopata.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/benefits_of_artificial_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0461/8105/6675/files/93846547836.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/15139862198.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/32428246639.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/point_biserial_correlation.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_off0000568f.bin
d713f7f22e49815f0933202eac1c963574ca9bb029937b541d085e82fa6252bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x568F 5272 bytes
font_01_sfnt_off00006850.bin
bf279bb3997fda9b25a33b33b55eff4cb54a5f0ae21247168a08671907d01585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 9896 bytes

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