Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab69e43b4850c14…

MALICIOUS

PDF

70.6 KB Created: 2020-12-24 06:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb58bf7a790977e5d6ce023dac12c45 SHA-1: 856cb0632b166cf48e119c0cef0523caa3db240b SHA-256: dab69e43b4850c1406cc3033c6357f9b8d09768945453420f83ca30d22066675
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a mass external PDF link farm, with the primary malicious URL being https://ggtraff.ru/aws?utm_term=university+of+wyoming+football+injury+report. The presence of numerous links suggests an attempt to distribute malware or conduct phishing by directing users to potentially compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=university+of+wyoming+football+injury+report
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f8907cccc380.pdf
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5f9fb9a4d3d9d.pdf
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5fdd841034579.pdf
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5fa84e3d3cb5c.pdf
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/b80950.pdf
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f8f2a9215d3d.pdf
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5fc8c4392a11a.pdf
    • https://cdn-cms.f-static.net/uploads/4423732/normal_5f97f5df394dc.pdf
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5f9f39fb2fc48.pdf
    • https://cdn-cms.f-static.net/uploads/4457008/normal_5fa9b427ef97e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dinigugaxej/kokonuvixigasuwov.pdf
    • https://s3.amazonaws.com/nakuzafol/chiari_1_type_malformation.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_off0000d383.bin
7e8e54054df37e7c4adbc5000cc7944c2e92e48a7effb4215bd2766d02827192
pdf-font-stream PDF embedded font (sfnt) at offset 0xD383 5680 bytes
font_01_sfnt_off0000e6e5.bin
775354394c855f0c0b3ec631fde0cd0e2f741d660a7c57a11b665d8591377a1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 11504 bytes