Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2ca1ea25172dc6…

MALICIOUS

PDF

42.6 KB Created: 2020-10-07 13:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aab7bd29e0412eea6b7807adb200fd36 SHA-1: 13c467f83d7eff38124904428c5980096b198e7d SHA-256: 5e2ca1ea25172dc6d54b1f87739466480560fad7d65c739abc8deaea18864672
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to disposable domains and redirector infrastructure. The document body, though partially obfuscated, includes keywords related to free PDF downloads, suggesting a lure for users seeking specific content. The primary malicious link identified is https://gettraff.ru/strik, which is flagged as a known malicious redirector.

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://gettraff.ru/strik?keyword=cambridge+english+for+the+media+pdf+free+download In PDF document text
    • https://site-1040298.mozfiles.com/files/1040298/49110525156.pdfIn PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/vuruwokebasujobobipipili.pdfIn PDF document text
    • https://site-1044243.mozfiles.com/files/1044243/21279441482.pdfIn PDF document text
    • https://site-1039199.mozfiles.com/files/1039199/97217060069.pdfIn PDF document text
    • http://pemaruw.coloradocattlewomen.com/uploads/1/3/2/6/132681670/bf20cf9b19e26.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/57601202647.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/gatado.pdfIn PDF document text
    • https://site-1039954.mozfiles.com/files/1039954/lafamidefipo.pdfIn PDF document text
    • https://site-1041081.mozfiles.com/files/1041081/zafuvamoparubisiwe.pdfIn PDF document text
    • https://site-1039275.mozfiles.com/files/1039275/64805665573.pdfIn PDF document text
    • http://files.samuelpakart.com/uploads/1/3/1/4/131407736/2468812.pdfIn PDF document text
    • http://xijadog.edwarddawe.com/uploads/1/3/1/3/131379410/xefefunedudis-wewenesatokivib-vulugiwa-legerobu.pdfIn PDF document text
    • http://files.centralchurchtorquay.org/uploads/1/3/0/9/130969755/9a33fcb2.pdfIn PDF document text
    • http://files.sfsnadshop.org/uploads/1/3/1/3/131381036/nudufip_wubovagonudumij.pdfIn PDF document text
    • http://jegerebuj.da4d.org/uploads/1/3/0/7/130775389/6640476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000068d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 5592 bytes
SHA-256: 918e8e67f5ae15f532d853e374819cf11769ef1a0cb545c6a2563684e2d9455d
font_01_sfnt_off00007bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB6 9788 bytes
SHA-256: 8130ea7dd338c059e923f426de8e3d07d3b65052c973f4db0a2b331ae5e5f1a6

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