Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec52a5af449376ec…

MALICIOUS

PDF

71.9 KB Created: 2020-12-25 19:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5df851e455493692daed90e7ef6a86 SHA-1: 4be387254b1f386d68311de729e988c6dd6203c4 SHA-256: ec52a5af449376ece06c2fb7438d7fcad6981d640817c1ceec11b7a90da185b5
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 'ggtraff.ru', which is also listed as an embedded URL. The ML classifier and ClamAV also flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Freedom mortgage sign in', suggesting a phishing lure. No scripts were extracted, but the presence of a malicious URL strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=freedom+mortgage+sign+in
    • https://cdn.sqhk.co/zirimikuj/RZimhwQ/69332624621.pdf
    • https://cdn.sqhk.co/vikeguzag/hbSjegj/batekijuligajo.pdf
    • https://cdn.sqhk.co/bujavenizake/tiaPidU/pregnancy_rash_on_belly_not_pupps.pdf
    • https://cdn.sqhk.co/jiwejujorod/RFXVSyd/box_office_movies_2016_hollywood.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gavexilatuvitaz/banished_imdb_parents_guide.pdf
    • https://s3.amazonaws.com/xazarujokemus/65669771276.pdf
    • https://s3.amazonaws.com/dusined/jogemotakojadomivolab.pdf
    • https://s3.amazonaws.com/rurovikejigibu/freestyle_libre_pro_log_sheet.pdf
    • https://uploads.strikinglycdn.com/files/ff60dca2-8b90-4167-b22d-52315bc0872d/ledimedovikigivu.pdf
    • https://s3.amazonaws.com/jamokaroxoj/bipodumorebabasekusaronoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debd.bin
c57d86a47eee7683aa5349ae25bb482c6eaecd8736870e76613c90d5d12a905e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 5068 bytes
font_01_sfnt_off0000efe4.bin
9c25cba1e8f34ed3a295fbf4cf49754ce08457436c6cf161027e763c9762085e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 10320 bytes

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