Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cee9047ab3bc478…

MALICIOUS

PDF

76.3 KB Created: 2021-01-11 19:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e8aed4ab8e40164d4586c339214141b SHA-1: 9ffaa97091782a0c306a68db8893e57a733537df SHA-256: 9cee9047ab3bc478a242f783f81cbf19174afbaeb085ce29efb546e382278e93
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/aws?utm_term=barish+hd+video+song'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=barish+hd+video+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5faa3ea6e7fee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fdc6322f1d8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5fe6fcd567eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495262/normal_5fe83bcc6039e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385422/normal_5fcb797995d65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370088/normal_5ff6b046d1ce3.pdfIn PDF document text
    • https://site-1178709.mozfiles.com/files/1178709/najog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5fb3db447e70d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fdad02ab6008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f87dda66f661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f992cd7c3a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fb2ae09a99ce.pdfIn PDF document text
    • https://site-1175983.mozfiles.com/files/1175983/allpoint_atm_mobile.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 5164 bytes
SHA-256: 735a0f62b977eab1ad23e981f14684497be369beca1e6232e59fd233613f41b2
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10240 bytes
SHA-256: c70caf32a8755222d9ac593d1c48c605321242cb61756b7d4576f0b8e1534cd0

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