Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7154354cba9f03…

MALICIOUS

PDF

69.2 KB Created: 2020-11-11 02:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42f16f113eb1793faec21dcac4786b5 SHA-1: 1529f5e82ec7770b99e1df78d78609b9a97004e6 SHA-256: 1b7154354cba9f03ad0e04248e4077cbdfc2118305ca3dda6adea704c46d98ed
214 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector, indicating a phishing or scam attempt. The embedded URL `https://ggtraff.ru/123?keyword=download+facebook+lite+app+for+windows+10` is presented as a lure for downloading software. While no scripts were explicitly extracted, the PDF structure and malicious link farm suggest it's designed to redirect users to malicious sites, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?keyword=download+facebook+lite+app+for+windows+10
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f8cc0f7754d0.pdf
    • https://cdn-cms.f-static.net/uploads/4452381/normal_5fa84cb81f693.pdf
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8881d940f40.pdf
    • https://cdn-cms.f-static.net/uploads/4417032/normal_5fa223558f9ef.pdf
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/2965375.pdf
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/2674488.pdf
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8d29f6abdc1.pdf
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/bivupetira.pdf
    • https://jotuxopa.weebly.com/uploads/1/3/4/2/134265841/tibisidoseruva.pdf
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fa32281e57fd.pdf
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f962493af2d4.pdf
    • https://nunamazo.weebly.com/uploads/1/3/4/3/134311680/sasesa_rugiwula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ae4152b-eac6-44a1-ad5e-42f017645bbe/ponegumevelumeduganopodus.pdf
    • https://uploads.strikinglycdn.com/files/99eea51c-18af-4ced-a1ab-98e909405325/wisasu.pdf
    • https://uploads.strikinglycdn.com/files/c0517a9d-a0a4-4be9-8326-f90f92f1303c/moxetos.pdf
    • https://uploads.strikinglycdn.com/files/56a8efff-7317-48fa-89f5-c018265a5b96/kajevutogufivabopur.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19f.bin
e3c0e953abeff90e437206b2dee502d1ee304ac2473e1f0b2115eebd858e4732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD19F 5636 bytes
font_01_sfnt_off0000e4fb.bin
a356865dce287c9b62845eac86b04ac9be44ab55815587b2b412420917421b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 10200 bytes

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