Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a3e8860272261e…

MALICIOUS

PDF

50.6 KB Created: 2021-01-01 14:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8231b6b06d5f1a868913a57f6fe3b8bd SHA-1: 52d00b236cbd2be2758e3bbd42a337cc82fec921 SHA-256: d9a3e8860272261e4a3a7afb290c8ff6c6845b6bdca5fe3ffd9835a102c118c3
212 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://gettraff.ru/aws?utm_term=free++office+2016+for+windows+7'. The document body, though heavily obfuscated, contains text related to 'Free office 2016 for windows 7', suggesting a lure. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection strongly indicates malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8650

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=free++office+2016+for+windows+7
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/jibagebuv_rexegomanopuva_melolagap_wawelo.pdf
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/fugub-koluvedejidal.pdf
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/b66c9f6e62.pdf
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/8195631.pdf
    • https://cdn-cms.f-static.net/uploads/4408001/normal_5fa0746b43c7e.pdf
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5fa161b0dc35d.pdf
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/pobarodepexa.pdf
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f974e0627ced.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebomedug/bedrag_zonder_btw_berekenen_formule_excel.pdf
    • https://s3.amazonaws.com/wovisak/ecommerce_html_template_themeforest.pdf
    • https://s3.amazonaws.com/fatikonavori/zen_mind_beginner_s_mind_free_download.pdf
    • https://s3.amazonaws.com/wilugugo/convert_to_word_doc.pdf
    • https://s3.amazonaws.com/buxoparadazegu/4524489065.pdf
    • https://s3.amazonaws.com/dedinavesute/robuxoga.pdf
    • https://s3.amazonaws.com/satedafadusizo/tirabavumedofejo.pdf
    • https://s3.amazonaws.com/palikuvexake/importance_of_holistic_education.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bab8.bin
bf882183bb09ccdf27f460d9992b9f8a8b314b625b89e6ee008782fdbf91a6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB8 5088 bytes

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