Malicious PDF — malware analysis report

Static analysis result for SHA-256 e113458689236c6e…

MALICIOUS

PDF

43.4 KB Created: 2020-11-03 05:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 86fec65f6e3c293d4eafff3342678795 SHA-1: 03da466390e46cb561ddcd8c1e4a8e37579402b7 SHA-256: e113458689236c6e8115f5850aa33f152b2e458781129f2d9183e702a1586b72
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL `https://gettraff.ru/strik?keyword=fan+yang+stevens` identified as a malicious redirector. The heuristic `PDF_SEO_LINK_FARM` indicates the presence of many external PDF links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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?keyword=fan+yang+stevens In PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/3405673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f9369d7de6fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f977a3f4106f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5f9e527297cc1.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/2670979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/muladekonuxipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/2126/7878/files/36401629852.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/cardinals_schedule_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/maths_aptitude_questions_and_answers_with_explanation.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/automatic_control_system_hasan_saeed_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/hey_nonny_nonny_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/wwe_immortals_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/barcarolle_violin_sheet_music.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_off00006a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 4840 bytes
SHA-256: 27b779436eb774d84f1e3b3034ee91c61039db1c2736ce38764e025e9927f366
font_01_sfnt_off00007aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAB 11568 bytes
SHA-256: a66cdecf0f4d17e522d452386bcd71fc67afce0fc26735ffdd18f7e05f509b66

Open this report in the interactive analyzer, or submit your own file for analysis.