Malicious PDF — malware analysis report

Static analysis result for SHA-256 7826f9bfb0ef4e7e…

MALICIOUS

PDF

58.8 KB Created: 2020-08-18 12:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c48d3b6eaec4c3b5013b07c9eba297f SHA-1: f8c830ba11309bf2bbde826f733bcd3595461774 SHA-256: 7826f9bfb0ef4e7e02541fea3b482f7f4e3b83a3f5798dc7d80f879f9a8a8182
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=jamboree+scout+guide+video', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same redirector URL, suggesting a lure or redirection mechanism.

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.ru/pify?keyword=jamboree+scout+guide+video
    • http://files.illustrioustees.com/uploads/1/3/1/3/131380000/dobaxukatolulizuw.pdf
    • http://kinudit.terileepottery.com/uploads/1/3/0/9/130969723/2d46f6bb813.pdf
    • https://cdn.shopify.com/s/files/1/0451/1003/4597/files/2020_buick_regal_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/varobokasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/cambridge_igcse_geography_study_and_revision_guide_david_watson.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/zifodidosirobakom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/nowinulogijotuxademat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/dukulakef.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/infinity_war_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/nowegujakobovemujefagef.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/compress_file_size_online_reduce.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_off00009f76.bin
1e3363931232148638541ac78e85897af731419dba8110f5148b93f14d02af48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F76 5416 bytes
font_01_sfnt_off0000b1d2.bin
af87bb842300dbbc7270adb0b3ee1e3c60e71683fb295d4be6802e075f4a733e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D2 14328 bytes

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