Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce237bc93e51bd82…

MALICIOUS

PDF

56.3 KB Created: 2020-07-30 23:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74abdc5f724fc540e6163e1700418a09 SHA-1: af59a928e8525045ac522b03113cd1f90612243d SHA-256: ce237bc93e51bd8267555a00c5dd67e63fcde6918ba6b53d888d2e43ebc293f5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a book title. The primary malicious IOC is the redirector URL, which is designed to lead users to further 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.com/pify?keyword=cannibals+and+kings+marvin+harris+pdf
    • http://files.tzununahealthyself.com/uploads/1/3/0/7/130775649/lisejor.pdf
    • http://files.burnsblufflodgeathighfalls.com/uploads/1/3/2/7/132712000/9448993.pdf
    • http://files.maidoecuador.com/uploads/1/3/1/4/131438216/zixikelexube-nubup-siriguriraduj.pdf
    • http://files.kobanuniverse.net/uploads/1/3/1/4/131438268/pekezaxisodok_sujunasewowazud_fofumebonekawu.pdf
    • http://files.kobanuniverse.net/uploads/1/3/1/4/131438268/pekezaxisodok_sujunasewowazud_fofumebo
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/lifusililerabatarodit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/kopojazinatixabumakuvoxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/30191794377.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/91446259623.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/gajixinarira.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/21987958594.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8487/files/47847458209.pdf
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/koruximub.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/1157495820.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/86027980712.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/56895859709.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_off0000a057.bin
5290aea526ce3432ee43637fb25ba058f763e6ee5a7bd331fbe9e00861b720e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA057 5224 bytes
font_01_sfnt_off0000b1d8.bin
fe0d09d7ff168259c55699e66a1cd29f5f98ed9e4da1a0fb53888db70bd2fc98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D8 10008 bytes

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