Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1cef628ccfc0541…

MALICIOUS

PDF

42.9 KB Created: 2020-10-14 20:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 26a9d45bddf9184a97b1b2f86eaf490f SHA-1: 553d93bcd89e0feb05aaeaee7da612b4c7b716b0 SHA-256: f1cef628ccfc05411060abd18961909e75a75f5f8538253aea3ed789bc800479
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=convert+pdf+to+jpg+free+windows+10 In PDF document text
    • https://site-1040284.mozfiles.com/files/1040284/zukurigananex.pdfIn PDF document text
    • https://site-1043259.mozfiles.com/files/1043259/latipojan.pdfIn PDF document text
    • https://site-1041609.mozfiles.com/files/1041609/45475096399.pdfIn PDF document text
    • https://site-1040339.mozfiles.com/files/1040339/65311964162.pdfIn PDF document text
    • https://site-1043976.mozfiles.com/files/1043976/zafilurotivaserudamuzeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f872dded869f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8732503f8f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f87113b4953c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1fbca4-db27-4dd5-a1a0-3ecebc76b442/88892467892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f70af2c-b8ae-4349-919e-295c722f0124/84474671377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bb1dea-0427-4f97-8e6d-9ed1b8589c08/83627594008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e559da2-0124-4519-8ff1-f0fb06ea769c/mixulikokaposimapopiteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ac1905-ae0e-432b-b580-74acf54289e2/ruzoturidirexunewidenija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8a3a2f-c124-4bb2-a002-0afa40aea3e7/vabiririjusimumiruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d85c8a-f12c-4992-91a5-7e5aca3e7e85/borikupojumamexizida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/zotebebifibapibojid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5553/7064/files/blue_whales_near_extinction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2682/7432/files/zulubagalikez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/vocabulary_workshop_level_c_unit_9_answers_antonyms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/carrera_digital_132_slot_cars_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0101/9030/files/bebamivofeleru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/jumonarolikuxezi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6928 5296 bytes
SHA-256: f399e56fb7ca1f5fe0de846c6951040e2f31380a8fa73f85b5e1eadf580013df
font_01_sfnt_off00007b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 10240 bytes
SHA-256: fa15d80085d0de4c79af81cf88a3f5b377d091ea4993741a6e31c1089de9f390

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