Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa70e5c5ef2db523…

MALICIOUS

PDF

71.2 KB Created: 2020-12-18 04:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 369b14c26b794b7e421705f856445599 SHA-1: 90458f227c22872a8c044c1ab6cbc6b348229759 SHA-256: aa70e5c5ef2db523a52ba96b4137354e97b2d783e4a7a5f4829381d0b5650d28
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL, https://gettraff.ru/strik?utm_term=1+night+2+days+season+4+ep+25, is identified as a malicious redirector. While no scripts were explicitly extracted, the nature of the PDF and the malicious URL suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=1+night+2+days+season+4+ep+25 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fa19bfbd5aea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc1fd173485235c860d2951/1606548759861/dragon_age_character_name_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/cuantos_pies_tiene_una_yarda_lineal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50e7aff13940aa25a4d24/t/5fd644c6226e9048fab26ebc/1607877830346/motu_patlu_cartoon_full_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/bengali_language_album_video_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc1bfbc9ee0f32b8793fff6/1606533053609/jerry_rice_college.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/wiribe.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/jogezunojef.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/russia_football_world_cup_2018_fixture.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6b3bc6682d375c9096f4/t/5fd6b66dc4373837b91816e9/1607906926190/weebly_templates_2019.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_off0000d8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 5496 bytes
SHA-256: b38273f6afef6ba57fb3415240886df4b253726a735a31c052d74666aec4675f
font_01_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 10660 bytes
SHA-256: 3bfc3cfb0e2e736bb9553528dee872339a866286b16070c6e293c25bc89f6e1f

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