Malicious PDF — malware analysis report

Static analysis result for SHA-256 2264e51f44a7c528…

MALICIOUS

PDF

40.4 KB Created: 2020-11-03 12:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 46f437464ed46b2820d0b41628dcab36 SHA-1: c96d9651e85f68fb30f18c4c5bcf7dfafb2fdcb1 SHA-256: 2264e51f44a7c5288f54f71efb984d3cac534a765c329a5af41e9ea0ce74e63d
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=uplift+summit+high+school'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document structure indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/aws?keyword=uplift+summit+high+school In PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/768418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f88d649b9d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f9f2e60e8eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8daa7537b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f8fa559a234a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f871070e0f91.pdfIn PDF document text
    • https://vukijimox.weebly.com/uploads/1/3/4/3/134358494/6932595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f91dd710817d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8932ee9e7c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e416374a-e747-4e19-af23-d9cea7bf2a81/annaliza_brillantes_scandal.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/nec_article_250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc56f835-70bc-42f4-88b0-67e58f85b1a2/43851733988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a917f44-3b90-4ce6-ac09-4f3e43410c2e/neverwinter_nights_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef110b9-01e7-4549-ad3a-42730049abfa/vululepeforuwov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833c0c75-8c60-40e4-9dce-20d7fd86d963/51588374824.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/willy_wonka_chocolate_bars_near_me.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_off00005f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 5116 bytes
SHA-256: a33c2a69d8a8cf22dfe1672100f4d44a8a0c6104e13f6cee35e361c21be936d4
font_01_sfnt_off000070ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70ED 10612 bytes
SHA-256: bcd91d49c318cba20d8bc8cccbd6ac8bb25295d3e074ebe977677b2016324ff9

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