Malicious PDF — malware analysis report

Static analysis result for SHA-256 926257cad2da1e4e…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64df8c31555ef7f8ab7ab696bee47def SHA-1: 33d8a6a7a4b01ac0f508099daca04c7ec22bf645 SHA-256: 926257cad2da1e4e457e251c420bf447260fe448f3adb9929c67954411667771
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though obfuscated, contains text related to 'exercice verbe etre et avoir ce2 pdf' and the wkhtmltopdf tool, suggesting a lure disguised as educational material. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a probable phishing or malware distribution attempt.

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=exercice+verbe+etre+et+avoir+ce2+pdf
    • http://zudigum.unityofenergy.com/uploads/1/3/2/7/132740892/2812293.pdf
    • http://files.westboroserve.org/uploads/1/3/0/7/130775347/lumujabexonotu.pdf
    • http://files.sweetavenuephotographyblog.com/uploads/1/3/1/8/131856112/5936769.pdf
    • http://files.fracturedpottery.com/uploads/1/3/0/7/130775490/tazumevotilejaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/lavenejufamawonijadoxop.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/notiluvutamukavolofade.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/fiwupivuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8647/files/72062034400.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/gesesolutokutiso.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/92222698339.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/zakojuvenizuniw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/86933683154.pdf
    • https://cdn.shopify.com/s/files/1/0436/5657/7182/files/dopakudik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/taralifavevidebozoriladu.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_off0000609d.bin
26bcc6f4ed0396e6b917b8f9b45a341d972e252f0e5f4c8cf5f6263c770f4a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 4976 bytes
font_01_sfnt_off0000719e.bin
c7d4e446e66008743a7ccaab8adf5c04103b9018877cdae9bbc1408959d7d810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719E 11960 bytes
font_02_sfnt_off0000974e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x974E 4324 bytes

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