Malicious PDF — malware analysis report

Static analysis result for SHA-256 b548deba99d4cf46…

MALICIOUS

PDF

75.0 KB Created: 2020-12-10 15:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d526a7d35b1c75132196e83b2a09896 SHA-1: 16fbb757eec00a93d5cd4e14ffe2fa279c2b8a72 SHA-256: b548deba99d4cf4605dd3e19c23036f224f2be9207254b0460ddbdb544e47b81
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=what+is+the+four+term+contingency'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier and ClamAV also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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/strik?utm_term=what+is+the+four+term+contingency
    • https://static.s123-cdn-static.com/uploads/4365570/normal_5fc4fd8fb0985.pdf
    • https://tijawuxegolizad.weebly.com/uploads/1/3/4/5/134597381/vezurapesibave_gonupuxisaxuleg_tefujapepo_kugiwopulijo.pdf
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f90ec8d5b3ab.pdf
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5fad9497b47f8.pdf
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/4830782.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5709f2bbd740658251595/t/5fc940a6f1248f59535edaad/1607024808110/bixopabilalosugo.pdf
    • https://static1.squarespace.com/static/5fc5d9e660f2895dc109c93a/t/5fcb172c36758319a54d2b45/1607145261603/zodif.pdf
    • https://uploads.strikinglycdn.com/files/11bd2b29-2c23-4b5b-8f68-ca10d132964f/partes_por_millon_ppm.pdf
    • https://uploads.strikinglycdn.com/files/210c24b4-48a8-4f75-b104-0081de59b869/pokemon_go_tcha_manual.pdf
    • https://uploads.strikinglycdn.com/files/5fc1e345-9da6-4c74-bf3b-b90996e587f0/3393070202.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_off0000e75d.bin
b3a285693a7b4d4ba370a3ca82458809b14603ccc2dfe40ad17ffef5c43640f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 5376 bytes
font_01_sfnt_off0000f992.bin
114d85bf45c85f923a61ba71e45a26cbe00774d908c417141782f551b28d07a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 11764 bytes