Malicious PDF — malware analysis report

Static analysis result for SHA-256 638630f669a6de40…

MALICIOUS

PDF

69.1 KB Created: 2020-08-26 23:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c64fa4a7ae8038b4e1339bbdf34a9bf6 SHA-1: 296417e7984f7abbbf585831e7e36b2ba20a3e76 SHA-256: 638630f669a6de40d439f4d4a650522c83066485c2818f33d94b71605a01066a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a '2004 ford ranger factory service man' and a URL that appears to be part of a link farm designed to host numerous PDF files. The presence of advance-fee scam lures and the ML classifier's high confidence score indicate malicious intent, likely to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=2004+ford+ranger+factory+service+man
    • http://files.ayurvedabarcelona.eu/uploads/1/3/1/4/131408169/muxoxu.pdf
    • http://files.healing-ginger.com/uploads/1/3/2/8/132815008/8127391.pdf
    • http://kotalozud.rachaelsterlacephotography.com/uploads/1/3/0/7/130739720/6663ffc3d788.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/financial_accountant_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/basketball_game_powerpoint_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/wobasukozivuzomitot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/aircraft_engine_design_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/algebraic_expressions_and_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/lovozis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/48838867612.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/aloha_oe_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3379/files/free_math_worksheets_grade_7_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/ritoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/lunobowaleraminikakid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c08c.bin
1b5a7fdc43b9f22f3d662f36f18b135c65eab0ba1ab00a9d6b4b8569f6c10e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 5740 bytes
font_01_sfnt_off0000d408.bin
eda213c58083650275537eb5ecc6fc57d54f6f4f270f8cf726b5fb858b8586d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 16664 bytes

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