Malicious PDF — malware analysis report

Static analysis result for SHA-256 428202f562f8c8c2…

MALICIOUS

PDF

41.9 KB Created: 2020-09-16 16:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022bb355a8e798842813d7e385ad8b78 SHA-1: 49a3c6a44f9a670d49fde8c824268b4442a49b19 SHA-256: 428202f562f8c8c237138e7f74db5c051b715117371483efd7d56572398ee0b9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF document contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine results or distribute malware. One of the primary links, 'https://ttraff.ru/wix?keyword=before+the+flood+student+worksheet+answers', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to worksheet answers, suggesting a lure to entice users to click the malicious links. No scripts were extracted from this sample.

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/wix?keyword=before+the+flood+student+worksheet+answers
    • http://wedives.ifeelsupernourished.com/uploads/1/3/1/3/131378816/6035783.pdf
    • http://rezagixof.beautydocuk.com/uploads/1/3/2/7/132740373/puzekifaj.pdf
    • http://zaxulopeg.learningwithlongrich.com/uploads/1/3/1/6/131637140/eefa207.pdf
    • http://files.profiledesigntooling.co.uk/uploads/1/3/1/4/131408027/gokopimenixubi.pdf
    • http://files.wyndancegoldens.com/uploads/1/3/2/6/132681479/xozefuz.pdf
    • http://files.iliossports.com/uploads/1/3/1/4/131453725/vimizok.pdf
    • http://files.kidstopinc.com/uploads/1/3/1/4/131453998/45d973b32.pdf
    • http://files.parkhillcc.org/uploads/1/3/1/4/131406831/beligefanir.pdf
    • https://c3b367ca-c7e3-4be7-9e24-f359b464476d.filesusr.com/ugd/65b209_86451bed7d03422dba838fb5c7982d33.pdf?index=true
    • https://df836dea-d05a-417b-9742-421d223f8343.filesusr.com/ugd/bc0b97_f925a92d9e0949aba39a303c26a218c7.pdf?index=true
    • https://40f01292-9ef0-4d58-b7a4-6819e280d90a.filesusr.com/ugd/d2759c_14a2e8e5c878467e94d4f1f472aa18c2.pdf?index=true
    • https://983367b1-5fa4-4a2f-a585-8550aea3675d.filesusr.com/ugd/668a47_35a6f862b1f84415a59a4e5c83099407.pdf?index=true
    • https://5a7b2df5-c6f4-4864-9373-47ec193ddce9.filesusr.com/ugd/98e2de_b48ad7a3f0be4bb38b1de0179dbfa191.pdf?index=true
    • 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_off000064aa.bin
f0d9d38e114f8899e953c69a36001dcf120860587587b12fec8fc9c627313db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 5200 bytes
font_01_sfnt_off0000766b.bin
9bc9637a0a271b19989734804c5964f148ed35eda98584609aae32c374094986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766B 10640 bytes

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