Malicious PDF — malware analysis report

Static analysis result for SHA-256 51336bf3ecb624c0…

MALICIOUS

PDF

50.6 KB Created: 2020-10-24 02:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076610352ce0d68577b6dc85a6b2c98a SHA-1: b4d492485471a4945a39250c485501b9798419b7 SHA-256: 51336bf3ecb624c0bfa7b42427d0ccdb80591e54ac17f9b971610b96f4500985
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many benign, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.me/aws?keyword=microsoft+excel+macros+tutorial+pdf
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f89f1eb646ad.pdf
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f929958ada13.pdf
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f882cf9eb32d.pdf
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8d375a5deac.pdf
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8735dc152b1.pdf
    • https://cdn.shopify.com/s/files/1/0483/5849/0275/files/cooling_tower_capacity_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0506/6473/4918/files/kufexokowezikisujojetoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/benchmade_infidel_3300.pdf
    • https://cdn.shopify.com/s/files/1/0467/5695/4275/files/maulana_rumi_quotes_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0500/9951/9656/files/textnow_premium_apk_2018.pdf
    • https://cdn.shopify.com/s/files/1/0496/0990/0184/files/minecraft_night_vision_texture_pack_1.16.1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/67481860841.pdf
    • https://cdn.shopify.com/s/files/1/0492/2812/0217/files/gusibokaxebodeb.pdf
    • https://cdn.shopify.com/s/files/1/0500/1255/3374/files/lavuvadenej.pdf
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/compound_sentence_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0502/6372/0119/files/antibiotic_prescribing_in_dentistry_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0499/5029/4171/files/set_fire_to_the_rain_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/senpai_kohai_karate.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/uc_davis_box_app.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/kojudovepejifepati.pdf

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