Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8770089cb0018a…

MALICIOUS

PDF

69.8 KB Created: 2020-12-19 10:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dd1b16274f16b0d371cb3ce6fcdd65d2 SHA-1: 5e0d7afff2f03347e24f3caa2a001a8d5696804b SHA-256: ff8770089cb0018a8d4d31d7a9798fceebf079ff0491e1c387071830a9ee3cbf
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'https://cctraff.ru/strik?utm_term=children%2527s+worship+bulletins'. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, suggests a lure related to 'Children's worship bulletins', aligning with a phishing or social engineering attack vector.

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://cctraff.ru/strik?utm_term=children%2527s+worship+bulletins In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bagisi/23961616848.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/types_of_capacitors_and_their_applications.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc605573f75b16643a2db86/1606813017548/57843374381.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/tepogukododikaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/indonesia_fintech_landscape_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/48260167621.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2ed17e7202640ea1bf0/t/5fc0fc19cb3e0f5771727e84/1606482970115/ethos_pathos_logos_worksheet_answers_key.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/5785326553.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/sadoloxivazamidotoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/kefigugafevurun.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/sansui_tv_sledvd244_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/disney_plus_app_not_working_on_roku.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/85101917672.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_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 5008 bytes
SHA-256: 639a3a7f38bd17d59301cb18a2fb99af3994b948c3cc426ba0253b63b77eaf42
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 11240 bytes
SHA-256: 7642de76b7e89eedbdeb8c48a2ab8a575256b3ca7a3e4580a8f505ab3dd2b42f

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