Malicious PDF — malware analysis report

Static analysis result for SHA-256 084985aaa34b9164…

MALICIOUS

PDF

78.4 KB Created: 2020-11-18 14:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ff46d1bdbec5a2ccf0383a8ed09b6517 SHA-1: d1e795cbd8667a49970d556b31b4174156aa93cc SHA-256: 084985aaa34b9164e5cc98d89be99a64d10225d061ef2174e074e051bf211e5e
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary URL identified, https://traffking.ru/aws?utm_term=adjective+worksheets+for+grade+6+with+answers, is flagged as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets.

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://traffking.ru/aws?utm_term=adjective+worksheets+for+grade+6+with+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8a7a9addce0.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/6b804ac102.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f8e993a9ce9c.pdfIn PDF document text
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/lasiropezoruna_rafuxesasesubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5f98cdf8b893e.pdfIn 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://uploads.strikinglycdn.com/files/ac383928-f4b8-41a6-85a7-d09ca9bda0ac/bagarafudisovifivikufej.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/64184590072.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/levadura_de_cerveza_beneficios.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/derotibetiwaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667417f4-2ed2-4b04-9a60-b9daf6d47ed0/xavedemitizabinerewidadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0446d8c-d97d-4d8e-8e31-81719ccf08ab/25425051455.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_off0000e515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 5472 bytes
SHA-256: 47ec0236b389dd03dbdad8f2802797876d6c7eda4a119df689baff0a76866f90
font_01_sfnt_off0000f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 11864 bytes
SHA-256: 5f519ca1ced82a8d0a0cf110126e346faa08941d17530d724f20908fab3108a3
font_02_sfnt_off00011e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E08 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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