Malicious PDF — malware analysis report

Static analysis result for SHA-256 17979c9a4e8a7dc0…

MALICIOUS

PDF

67.1 KB Created: 2021-01-01 10:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 07b4499cf9db1966c6b42c2ff85b6d41 SHA-1: 5fa29eee70edf7bd5dce10a8e7668e8ba142bdc6 SHA-256: 17979c9a4e8a7dc0dd1bcb09d703e1f7a4c62edb3573898f9db8ad7336e1ea2c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link pointing to 'traffine.ru'. The ML classifier also assigned a high probability of maliciousness. The embedded URL is likely intended to redirect the user to a malicious website for phishing or malware distribution.

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://traffine.ru/wb?keyword=my%20talking%20tom%20and%20friends%20funny%20videos In PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/komevi_tasejobivaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473415/normal_5fcd7f82251e2.pdfIn PDF document text
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/wivibixifur.pdfIn PDF document text
    • https://patilufadan.weebly.com/uploads/1/3/4/4/134462925/222f3f1bb52.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Rgjhejh/97325949060.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/zagivimobawig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455207/normal_5fed13760eeee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462980/normal_5fbdd1eb55b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f98f1174cbbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389394/normal_5fdc9e8dc414a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB711 5456 bytes
SHA-256: a51f163fdfa1abad9bb63b80202a8e4e4a16e9d33e306fbe1627f92685cca410
font_01_sfnt_off0000c9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 9232 bytes
SHA-256: c4a9ea7c6e75cc6aa8d932e47a7ef450f5824e49d2ab8e5daf7c5ee3189cf8ba
font_02_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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