Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdcac6e1a0b8a849…

MALICIOUS

PDF

86.2 KB Created: 2020-11-30 05:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 100329e17d2189f7c73dc4f889a2e5ed SHA-1: 1b38a6f28597a2b2eafaf8a833451b827457845b SHA-256: cdcac6e1a0b8a8498c4eede717194f0609c0bf00add0cccc7ad77b44c3282b69
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffine.ru/strik?utm_term=aprs+mountain+lake'. This, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of embedded URLs and the overall malicious verdict point to a malicious redirector as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=aprs+mountain+lake In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5f9c76aee2ecd.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://s3.amazonaws.com/xeponodij/jazulipovidubim.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/roxebimulutejononamaka.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/viridian_apartments_colorado.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/71644022940.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/the_portuguese_george_braque_ap_art_history.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/45381719655.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/25807736487.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/patriarchy_in_african_culture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/647b31bf-b07b-4edc-8d31-8664eaa3651e/35622577107.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/excel_add_values_from_multiple_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/fatogibin.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/lamoille_county_superior_court_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/kirifuw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 6328 bytes
SHA-256: e6b42fb7f9f15a9fc3158273074e7ad15455d557ed190027c06e081795b971cc
font_01_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 4900 bytes
SHA-256: 87fcfb08bb2ce8d4382b2914676e2ce5fccfe60efcf771425e18da6a070a1f26
font_02_sfnt_off0001166d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166D 11496 bytes
SHA-256: 20074a667a7929ece15eed889261e0b5e3928dcafe3eac8af8d4e79f4fb7a76f
font_03_sfnt_off00013d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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