Malicious PDF — malware analysis report

Static analysis result for SHA-256 560205c3bfb8183e…

MALICIOUS

PDF

63.2 KB Created: 2020-10-01 23:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d7bc23423798e91220c1b0766f876892 SHA-1: fd6e27889774b8717ec70081f1ac1f0cb7d18e8c SHA-256: 560205c3bfb8183eba0df393f0cc4d1eae594d8d4a540e396abec2cb32672d57
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to manipulate search engine results. One prominent link, 'https://gettraff.ru/strik?keyword=vishram+singh+embryology+pdf+free+download', redirects to potentially malicious infrastructure. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious redirector or downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vishram+singh+embryology+pdf+free+download In PDF document text
    • http://files.chrissysfantasyfaces.com/uploads/1/3/1/1/131164488/8887.pdfIn PDF document text
    • http://valuxir.elksfairwayfoundation.org/uploads/1/3/1/4/131453574/58b8e83.pdfIn PDF document text
    • http://mufisuxaf.michaelkubisch.com/uploads/1/3/0/8/130874118/kefesiwilapalekogubu.pdfIn PDF document text
    • http://wapil.awhitehousewedding.com/uploads/1/3/1/4/131438523/2707538.pdfIn PDF document text
    • http://gozofadi.debarana.com/uploads/1/3/0/7/130739996/17c5d355ac1adb.pdfIn PDF document text
    • http://files.ilovehomecleanhome.com/uploads/1/3/1/3/131384544/rowipid.pdfIn PDF document text
    • http://files.healthcarebusinessconnection.com/uploads/1/3/0/8/130814308/ce2052dd990bc6.pdfIn PDF document text
    • http://files.sbpom.org/uploads/1/3/0/7/130739744/doxotadifaj-gosejetir.pdfIn PDF document text
    • http://sefipuzaw.simplifiedbybobbie.com/uploads/1/3/0/7/130740596/828baa2.pdfIn PDF document text
    • http://nuxumuvir.babyg-lash.com/uploads/1/3/0/7/130775583/1617803.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3620/3415/files/79429481143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/app_to_sd_card_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7829/9031/files/endothermic_reactions_and_exothermic_reactions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5852/3031/files/joxatikojerudexaviwibowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/booty_warrior_boondocks_quote.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_off0000b336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB336 5752 bytes
SHA-256: ebb56267f991420a0847a1b58d64477adf0518a090332ac5ff7325754256c726
font_01_sfnt_off0000c6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BE 12532 bytes
SHA-256: da2ef0c6fd23a4deb283e7ea9b4dd6746cb15ad3c2a77559e85b41918a7fda8f

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