Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04c7296b9f55526…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 03:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dfe68644a82c7c0eb800d5081093a6c SHA-1: fdb90a8acc4c62406fdd3595a938e43d9bf0d711 SHA-256: b04c7296b9f55526ea1edb0ef6af550cdf9cebbc2ad43b37bee878404ee59eb5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=user+interface+style+guides'. This URL is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of numerous other PDF links, while some are marked benign, suggests a link farm strategy, potentially to obscure the malicious redirector.

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.link/wix?keyword=user+interface+style+guides
    • https://static.usrfiles.com/ugd/b8c837_008fd272bb57404784e4a5b0f62817a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_96d04563b91e43d4904875a785eaa00c.pdf
    • https://static.usrfiles.com/ugd/b8c837_45eea6fc25a44ca69e9ed652ba3cb6c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a927fb0957c1426aac563ceaf608d715.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f185cc794ca49588f4afe08f75ebdfd.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/ganid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5710/files/88115735267.pdf
    • https://cdn.shopify.com/s/files/1/0434/1288/1564/files/financial_reporting_accountant_salary_uk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/sunstone_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/amharic_alphabet_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/walt_disney_world_hollywood_studios_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/transformer_center_tapped_secondary_winding.pdf
    • https://cdn.shopify.com/s/files/1/0432/8200/6171/files/fikelefog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bec.bin
b57a4a9b77ebce77cb66f60cdbfdc1190712e3ea3b62777f4a053ea617b3a295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEC 5052 bytes
font_01_sfnt_off00006d22.bin
b92a14ccddcb9d26d66e28caaaef1d8b2e1d01df7aeb9f7a9dab8ea95797d1b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D22 9896 bytes
font_02_sfnt_off00008ef6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 4324 bytes

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