Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3164136a34d062…

MALICIOUS

PDF

41.3 KB Created: 2020-08-22 14:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a157ff5bfb1e8b266508b674d4ccfa03 SHA-1: 77997dd391bd3919807c819c93a4248810f99a07 SHA-256: fb3164136a34d06239ba668ede9c079ed8faa1c1e7ec19451f7199528299ae40
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring users to a malicious site via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=moments+class+9+chapter+8+question+answers
    • http://files.jacobcharton.com/uploads/1/3/1/8/131856715/nufoto.pdf
    • http://files.empoweredmotherdoula.com/uploads/1/3/2/6/132681749/1231560.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/fozadawupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/76948098926.pdf
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/paychex_forms.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/22098130154.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/chapel_street_bars_broadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0968/files/introduction_to_automata_theory_languages_and_computation_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/5848/6678/files/job_analysis_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/purumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/the_v_games_2_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/6507016937.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2220/files/fezativorofo.pdf
    • https://cdn.shopify.com/s/files/1/0443/8438/7238/files/definition_and_concept_of_agroforestry.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/scp_bobble_the_clown.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_off00005f77.bin
0bc3bcb010d143a06daf9ecb47fa972fd65be728812cef51c7d00253a7ab0d86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 5748 bytes
font_01_sfnt_off000072f1.bin
2389c30ac4cdfc28d04e533fc443f4aa46acecd999b7a718782f5846070e6879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F1 10332 bytes

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