Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ea3d9300d1164c…

MALICIOUS

PDF

39.3 KB Created: 2020-10-25 12:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 5d70ed687290aa095954192342fb0b08 SHA-1: 9cb37c26c2cc7be0053f7bc8718f8aadd6505da1 SHA-256: 75ea3d9300d1164c8ce92593e62654d400c7b99bf461f6fbdc3dc2b584300b2c
184 Risk Score

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.
  • 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.me/123?keyword=letters+of+the+alphabet+worksheet In PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/weketipuxefo.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/2898657.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/kasawo-rakereroboxit-wuzunirib-midagawatebogef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f9474d6a73e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f92eb25bf147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5f8e9ee7e587e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_5f9208b8d449f.pdfIn PDF document text
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/feviten.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/2cc4de7ee6.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/6031198.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/6792893.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/wavek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3839/9902/files/pazisutisasinija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1242/6397/files/doom_2_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4246/2618/files/jufifixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/3368/6693/files/monster_truck_parking_game_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/60916658498.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_off00005a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 5228 bytes
SHA-256: 2ca2967c336e87e5dd26e79fe03c71d7b111f46d46d44fd2e6dc4c5c98bede37
font_01_sfnt_off00006c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 10624 bytes
SHA-256: 8d11a9b69253ed6128a92d2dd85f60796914e00e2503f8123d9a63b9f764b5bf

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