Malicious PDF — malware analysis report

Static analysis result for SHA-256 1512d379d078aee5…

MALICIOUS

PDF

38.1 KB Created: 2020-10-26 15:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e1579793a2f24feaf2826d20c8821011 SHA-1: 00ebdad438df316d0a47f25ddb1342798441663e SHA-256: 1512d379d078aee5405bbe8228bf557de094dcb45f3955bcb69b4af9a7c25087
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.cc/pify?keyword=grammar+exercises+there+is+there+are+pdf In PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/1988296.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/7878292.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/85bc7b.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/680ded005bf.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/gironopab.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/xobafipat-lesajodelabi-ginizolimitosuj-petatokuti.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/722359.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/kifurilaxajap_vazuzoforir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f92447801826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f8af9f30d6a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5f8f24f776dfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f906f890f0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f9671b5dd6ad.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/20857ff2-eca1-4af8-81fb-45fa10347c45/lolega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbea6e2-6b58-4bde-8ad5-bb94c8e9d92f/rafuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/psicoterapia_psicodinamica_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8074/0771/files/android_studio_turn_off_instant_run.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9924/5723/files/vakaxotofiwipanidugadiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/xudojajivanafi.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_off000055dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55DD 5464 bytes
SHA-256: 1ff4eea2efc1e0e09a6856a8a1d48337a04495e591427597ffa536d52cfc2261
font_01_sfnt_off00006858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6858 10208 bytes
SHA-256: 041177a4e0eee34765c72755add60f6645cd346ba327b631426f8781fabef408

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