Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda8c5ca813d8dbf…

MALICIOUS

PDF

66.0 KB Created: 2020-12-24 08:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2a81bf1719572c67c14f5b68c00d223c SHA-1: 8053ed230a4dce4fd063cf253636cb53aead7c1b SHA-256: bda8c5ca813d8dbf5ef504f96baa56454f81056dc7cb5aa7e504ac7920529a3f
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'https://gettraff.ru/123?utm_term=star+spawn+seer+5e', which is flagged by multiple heuristics as malicious. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of a malicious URL within the PDF structure strongly suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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?utm_term=star+spawn+seer+5e In PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/nadatapinevex-mumatej-jezinenozabap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447460/normal_5f9e1f37a4c5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_5fa33f86cf992.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/siiwicq/2075831014.pdfIn PDF document text
    • https://dowikawi.weebly.com/uploads/1/3/4/7/134741621/b1efa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5fa58df62c4cf.pdfIn PDF document text
    • https://vadulovoke.weebly.com/uploads/1/3/4/3/134338980/gufine-rulegekoraw-lawizuza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5fe01a521366f.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/gdCNigF/puguwo.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/ae367501-3a1d-495c-8d58-819db3d7dc21/mafeme.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_off0000c7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C3 5100 bytes
SHA-256: 8fad879adc64cbead50aa8df7bff3142f7a763835e36abef23a27f241fab29f0
font_01_sfnt_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 10116 bytes
SHA-256: 77f1ff62f76b7dbc3a1f486581e7a67cc1a81ded797a7bf3b5a9ccf5add5dc82