Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f4b9f0443fe1bd…

MALICIOUS

PDF

71.3 KB Created: 2020-12-31 03:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eeb3094ac3d0a0391df257fc557b29e3 SHA-1: d51f04a5d227f2c454811710d3e8925bc33d1088 SHA-256: 99f4b9f0443fe1bdb65fdb2ae337a54bc0eeb17d6d0a797e026d733a54c87cf7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of malicious links and the document's structure suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=i%2527ve+got+a+feeling+lyrics+gospel In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392651/normal_5f9f3c6889e97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5fab0d154fdc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fd632dbbe835.pdfIn PDF document text
    • https://tumafivefaj.weebly.com/uploads/1/3/3/9/133999435/8542424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490736/normal_5feb887b9900a.pdfIn PDF document text
    • https://vekosakebasagi.weebly.com/uploads/1/3/4/7/134743747/xuzavadoniwudus.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://baxakazakibabim.weebly.com/uploads/1/3/4/5/134585713/5952271.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/teximikamukubo/wulusogivijuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39544502-dc1c-464a-9c4f-0902875d58b1/juvulofurijuvifojunevub.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_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 5316 bytes
SHA-256: 7ca6cb2f598f6ca5cc4904f3307f56ae9a94215928068ee356e6895ef1cf8294
font_01_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 10336 bytes
SHA-256: d6d332822450232e92fb3220bc963ca35a4c62f302be79ec42a4280c0e54d0d1

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