Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb06bf53bdb8bc81…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 11:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5745c18828325575bdcbbd9c65de34db SHA-1: a1286d2ab56c9c9b7cdbc0bb806eb98af4ac14b6 SHA-256: eb06bf53bdb8bc8104ef6ac3d1c638059d4d9aaf91d7fc7e0f8e775d363cf517
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'heat detection in dairy cows' and references to 'wkhtmltopdf', suggesting a lure document. The presence of multiple Shopify-hosted PDF links indicates a link farm strategy to obscure the final malicious destination. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=heat+detection+in+dairy+cows+pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.villinlannen.com/uploads/1/3/0/8/130813769/naxix.pdf
    • http://files.dehoniansocialjustice.org/uploads/1/3/0/8/130874197/4935510.pdf
    • http://files.tiffanythetherapist.com/uploads/1/3/0/8/130874246/fufajetemipaduvufuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/rebedigazupawegewol.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/limakuxazipokikekugekize.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/23967397636.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/mavevadu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/gopodorizekesesuxojovira.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/wojoperiwugalimutuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/diralujamajawupakame.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/66180918380.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/hearthstone_arena_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/honda_gx160_parts.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_off00006a56.bin
6a381cfa62ac5ee736b36e5c9ca8b62ce6ecc2350d1751bf42e58665c6a38424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 5272 bytes
font_01_sfnt_off00007c6e.bin
4d4f51d0b77ef1ee81f2a59a6ee2ca1999f9d36a1bfb0f69c45794ab0c71a5af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6E 10368 bytes

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