Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c3800b5730bacf…

MALICIOUS

PDF

64.2 KB Created: 2020-11-17 10:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 79a10b28aad98af8b2174ab9564741e2 SHA-1: 2c042e1620e54fa0862b8f2e8bc5bfb0efc41ebb SHA-256: 17c3800b5730bacf9a4a0e5e832b457e6c527c79a660562fecffbfb48198af3c
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?utm_term=biography+graphic+organizer'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=biography+graphic+organizer In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/henghuili-files2/69488514650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3814d2ec-199d-486a-ab9f-48f9c4a5cb9f/pubosapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d25233-3473-4578-8c60-cb3a8dd5ca58/14156593797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e9acaf-4671-4f68-addd-d4516737842e/jotefagibareranel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe00559-6a9c-473d-837f-b32c840ace9b/tojetuwawij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1daf67-45f4-4ccb-a615-9f3c82a42f29/introduccion_a_la_seguridad_informat.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/mugiwasilefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becbdddd-50f6-474e-9563-cb08171c61f9/97322094591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db64726-91b8-410d-9d6b-9591d14ca948/spss_veri_C3B6rnekleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6437ec-6454-4a80-a3ce-54e3e567e8ed/8616622587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0463b8e0-62d0-4b40-8f62-ff1190fa47bd/42835550907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbd93ee-b4d8-4cea-bef4-18b1a682a8ae/31523071199.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/borubojunu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB376 4892 bytes
SHA-256: d33ba34911ec10b04715f0ca3195a8635eb8b6ed2ee1f2acc9792e8506290e5e
font_01_sfnt_off0000c411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC411 10008 bytes
SHA-256: 4bef15d86d945a3ae4554a6563cd51524e5f78b91629ac9acfcd7db3e07ae660
font_02_sfnt_off0000e61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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