Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8bf1be945cfd53…

MALICIOUS

PDF

66.2 KB Created: 2020-11-22 00:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 15e74d51e746d920380bfc3cfb11f784 SHA-1: c6154f102345ad6f5edd008f5cef01315cf09bbb SHA-256: 4b8bf1be945cfd532450b0851ece186d75832b537cbc7d337163b3c140a77e0e
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://gettraff.ru/aws?utm_term=inlet+guide+vane+operation'. The ML classifier also flagged this PDF with a high probability of being 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://gettraff.ru/aws?utm_term=inlet+guide+vane+operation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5f9cbaaeb7935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5fb7933e6bb0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5faa4494475b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f8fc01cca4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fb7027a784f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/google_drive_desktop_404.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/74962790030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d865a74-3f02-4a6d-ac03-642581816d96/fowaxegamelodomanepolag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24e981d-5f68-4472-b75c-11a70703971f/5190613521.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/oci_renewal_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/40332272600.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/sirapeneripoxovu.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_off0000c579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC579 4944 bytes
SHA-256: d484d8af97c7705726fff1f2a9e6e434ae35f52a25be952aead9fc87612969cf
font_01_sfnt_off0000d665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD665 11184 bytes
SHA-256: c6d189f3c49ce96a7dbb0f0c0e3628fa512657c187144568ffd240df239a1a94

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