Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66ea466d93e07fa…

MALICIOUS

PDF

99.4 KB Created: 2020-08-09 13:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d102433886c1c71255b8fd7929b1ab SHA-1: 454f5bd82aea873ad9a719d8566132840cfac9f3 SHA-256: a66ea466d93e07fa6733221ecbb91c89c6f9ceca279c84abc099e968ecfa771d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL which is likely used to redirect users to a malicious site. The presence of numerous external links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=les+neurones+de+la+lecture+pdf
    • http://files.jennadmassage.com/uploads/1/3/0/9/130969469/7645109.pdf
    • http://tabisi.emmamaitland.com/uploads/1/3/2/6/132681513/c2a0bfa8b87f.pdf
    • http://zirazolo.msjacksonsclass.com/uploads/1/3/2/7/132712207/21b58410395.pdf
    • http://files.lexcoffeecottage.com/uploads/1/3/1/1/131163684/9087941.pdf
    • https://cdn.shopify.com/s/files/1/0437/1120/1435/files/78761317120.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/recessive_epistasis_ratio.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rewitetesekumipepejeto.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/kukaduxufikujemufaruzo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0741/files/49874287814.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/jquery_crash_course.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/42870346171.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/ruvijem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/sepifasat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95181885481.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/67248469917.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/xijofe.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_off00013463.bin
5da8f33acf2cec997d6a0cd49e0359478f7fc37cadca629f31916b38ef9a9ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13463 5092 bytes
font_01_sfnt_off000145c2.bin
c85f525407eeaf402eaa9517a2d32fcf2f20d225f72a368f6a3a897e99548a03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145C2 19532 bytes

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