Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75c6bd00c1c6006…

MALICIOUS

PDF

69.8 KB Created: 2020-11-19 07:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a758234254ce0194b2f8cb3f9452c736 SHA-1: 7fa1956a0cf33d69d262f5062ceba97fcafd46d4 SHA-256: c75c6bd00c1c6006edd93aea3b283ff9590c4a89b3b855b7f8bf298485ae950b
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=calendrical+calculations+third+edition+pdf'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

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=calendrical+calculations+third+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_5faeb69f66059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_5fa80306b5527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5f9acd5b824b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_5f976386c7ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f9c9ba33b0ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5f9f0b2828ddd.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/cb1dfdaf-a227-4da7-9a70-b1577526a67a/52684858064.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/dyson_dc25_animal_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434068f3-cff6-4b03-8787-089f89797c94/caracteristicas_de_la_belleza.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/bangla_natok_audio_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5521b01-bc2a-41e6-8cf0-5eb41f7b79ba/nj_dmv_driver_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/pengertian_tes_cfit.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/fazixisenerofefibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ece1d33-1b98-4f2c-8871-a1b02ebfb3de/74845818685.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_off0000d44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44C 5148 bytes
SHA-256: 319b03c75ca66eea10293dcf8df33a95fd95fe058f95dbe7c76c6e82137cc86c
font_01_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 10828 bytes
SHA-256: 8358e779816c84128feb447ac702b30ef73b9776eccd507e8a092fbd10a11d29

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