Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7af607ab61bb64…

MALICIOUS

PDF

41.3 KB Created: 2020-08-25 02:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47644ad80f4ea5e424b1ad7cd93c4f5e SHA-1: cba5090f15a54cceb4f1353205bfdff1fe3b85c3 SHA-256: cb7af607ab61bb64260da7e88bcf72d112fe6d9702f386c7784a26cf645c4b69
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as plantation guides, with one primary link identified as a malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf. The embedded links are designed to lead users to potentially harmful content, likely for phishing or malware distribution.

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=jasmine+flower+plantation+guide
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdf
    • http://files.loripowerwriter.com/uploads/1/3/2/7/132740541/f129df5f50.pdf
    • http://papijamij.american-stock-research.com/uploads/1/3/0/8/130814347/piris-xeluna-josununenaj-puriwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/28506823914.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/simple_monthly_budget_worksheet_for_young_adults.pdf
    • https://cdn.shopify.com/s/files/1/0430/1497/9737/files/zefonatuninofadinovor.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/xemosisekevusuvowirolar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/50459087973.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/wuravikesodelefemefado.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/imo_safety_signs.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/nozifi.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_off0000634f.bin
b834165975fdcf8c06d542a6b270383c538a9c684e21171d0cadd5a0fff37e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5444 bytes
font_01_sfnt_off000075c9.bin
4325889b953b841e2e6a7ec4b17181761d3ec0cb1b85bb0b5c50333a7a92c957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 10304 bytes

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