Malicious PDF — malware analysis report

Static analysis result for SHA-256 7340acf0f373139e…

MALICIOUS

PDF

43.9 KB Created: 2020-11-07 23:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b96fbd69c2348dc62d5d2bfbdbf4901 SHA-1: 2f2d8a87acbd1310ca230386c1a84cf6be767c31 SHA-256: 7340acf0f373139ec1ac36b840c6fc316f32b15bd29bb120395454617f1779b3
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a link farm and impersonates Netflix, indicating a credential phishing attempt. The embedded URL `https://gettraff.ru/123?keyword=definition+of+incremental+change` is identified as a malicious redirector. Additionally, the PDF utilizes wkhtmltopdf, a tool often abused for generating malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/645815.pdf.
  • 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://gettraff.ru/123?keyword=definition+of+incremental+change In PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/645815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_5f9cf8aa7cfcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f98a605b4823.pdfIn PDF document text
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/lixukewimovu-foxevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f9666d044170.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/genupumurubizigoguto.pdfIn PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/dofetukijubu_mijufumafuga_kimoxobodaju.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5fa30924d56ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/south_park_library_pittsburgh_pa.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa7717a-fd2e-44e3-8533-8eb7ef9808a8/dutululorog.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/97751747013.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4D 5116 bytes
SHA-256: aafd91daca88fbbbd7b8daf41d74fcd665bdf8ca209b004b9e5e30581b39ddfd
font_01_sfnt_off00007e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8E 10632 bytes
SHA-256: c6b1764818dd4606f063c641487028bdc91403815c8ed7bb4c3957078d283733

Open this report in the interactive analyzer, or submit your own file for analysis.