Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8964417edaca19…

MALICIOUS

PDF

67.9 KB Created: 2021-01-09 18:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 08a7b918246786b4e3c7fb9fcd2cd92b SHA-1: 5ddfed380374e1fbaf37f6548be407a6d4da78ad SHA-256: 4f8964417edaca19331dda31cf1b8e011f0d25f933190a2626482eb26b064ec8
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://gettraff.ru/123'. This URL is likely used to redirect victims to a phishing page or download further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector indicates a phishing or malware distribution attempt.

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/123?utm_term=java+a+beginner%2527s+guide+seventh+edition+pdf+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_5fc5fcea5c339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5f90f7dae6646.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/nuxulikiwab/tizarorow.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/perth_to_broome_guided_tour.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/ansi_ashrae_62._1_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3071ddc4-43f8-4fce-870b-541abe375c59/95514723645.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/79388774305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3c368d-bc90-4c99-9f63-e3b64d9ebec6/velodiwenagutizunulekovej.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/34384972530.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/brocade_6505_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/xinut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5de8a6-30b1-469c-8d23-53b297bcb9ec/71413335965.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/10909921823.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/tableau_action_missing_fields_on_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/909_area_code_scams.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_off0000c7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F9 5616 bytes
SHA-256: 38b93bfbd18529dcaa855773f98df26c104ab3a373a87cc62f3f3d2c5559dc30
font_01_sfnt_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 12772 bytes
SHA-256: 4962f8fb06b14303de50f34d733f5e889e664189b3db9d913a7cd96753df1542

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