Malicious PDF — malware analysis report

Static analysis result for SHA-256 d444fa4fee80eed1…

MALICIOUS

PDF

54.8 KB Created: 2020-10-30 08:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e402cf0261df87fba162e295edda47c5 SHA-1: 650be6366e92c45f3f8801eb0603bd70e7a5e9eb SHA-256: d444fa4fee80eed1e73f603b5e47bb094a1e73ef7662e511a2e749397cb886eb
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://cctraff.ru/strik?keyword=fitbit.com%252Fsetup+manual+alta In PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/sizipezetiv.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/5435090.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/16bff.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/dejarajuzum.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/4242220.pdfIn PDF document text
    • https://vudiwajexisipu.weebly.com/uploads/1/3/4/0/134096418/238395dafdba.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/a1f5435d-bb4a-4dad-ba89-a26600949c09/11258446703.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/medicinal_and_aromatic_plants_in_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4469/7750/files/26325295487.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/practical_english_usage_download.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_off000098d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D0 5144 bytes
SHA-256: a0884848108dd778b7dbebe4dc87a15357cbd8c186978943b3ebbca9ada7b331
font_01_sfnt_off0000aa4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4D 10640 bytes
SHA-256: d7853d9fd881c50caa1de25efef9030ca0d8f7ae4a8569ffad26492ef28114ef

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