Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d08856a024437a…

MALICIOUS

PDF

44.5 KB Created: 2020-10-31 16:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ec9ffb19826a4ebc3565df6687544285 SHA-1: b991c910cd9df1a0fe00d961953dfb0a5be424db SHA-256: b2d08856a024437a5a1ef33acda30629d6c2c508358c14cf3554a4baee54e8d4
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable hosting or known redirector infrastructure. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://gettraff.ru/123?keyword=real+steel+free+full+movie`, which is likely intended to lead the user to a phishing or malware distribution site. The document body also contains this URL and other PDF links, suggesting a link farm designed to generate traffic or distribute malicious content.

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://gettraff.ru/123?keyword=real+steel+free+full+movie In PDF document text
    • https://zewuxufasebi.weebly.com/uploads/1/3/4/3/134320084/rivavuzizujosi.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/6019285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f93a350ea7ee.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/zavojusod.pdfIn PDF document text
    • https://suleduzon.weebly.com/uploads/1/3/4/4/134403341/gagajuboxu_dezipoja_zozeju_kusevadufivaxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f880bfeac6a8.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/3799729.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/ziwasipipinal-wemarad-maguwud-wosorixikamiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f88a88810933.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/490299.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/95527848-c2f6-4bb5-af84-1e6956c87a03/vunoduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cec0ca-dbb6-46fe-8198-6bb9a77a0d01/pofisivosewujobagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22bd4ca6-7921-45e0-bee5-70ac67269561/lelirevivufusuzajinopobo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/1403813488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd438c58-8e40-4313-9a23-2a4bbe3b32a8/97154811830.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_off00006f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8F 4980 bytes
SHA-256: 258c0023e39b3c65bfcccce50934549665f84e1c499342073a15df3faa5127b6
font_01_sfnt_off00008073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8073 10948 bytes
SHA-256: fed6f9a3d9565fad256cb100f6dd9f3fd5ce0f7983c7fbc9ab52f6a0324e6563

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