Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f3cc9405bf9f16…

MALICIOUS

PDF

71.6 KB Created: 2020-11-25 06:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8230039bc2a5e387ed627b6212f8f070 SHA-1: 70634cb5729b9380931f8215a5df5d5392a4c3e0 SHA-256: 76f3cc9405bf9f16d707e4f1f106485eaa4c39e631c34e36e25f4daaebb0b15b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=what+does+contemplated+mean+definition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5f9c61161d299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f8889edbb0f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8da112e9364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5fb32f98ab741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fb2f2ac9379e.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/9e9a063b-311d-48ae-a64a-252eb0fd9643/77436991934.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/nudir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749fa039-5717-45ec-8ed4-3683035ae580/dujiwapewidef.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/dorujebiwiribepidobiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a0dc3e-d7d1-40ff-b9ce-f44c71d72027/81536419656.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/85526248911.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/the_most_dangerous_game_theme_of_justice.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/fikotab.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_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 5312 bytes
SHA-256: 26a621b689a0c68ada5e23032d716758637363852ab483386aa1e54aba61ed83
font_01_sfnt_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 10928 bytes
SHA-256: 51b7b1b18d7451c2b45392be1d6e72efe65f6b25e6e9dde44344836a639612a1

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