Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1508976af8b56e…

MALICIOUS

PDF

61.6 KB Created: 2020-11-05 08:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 63423aafaeef388746239c35ddc185c5 SHA-1: 157024d9d30e13a48ba8a09212175f7a609b1085 SHA-256: 4f1508976af8b56ea55a5225ad4cf8eba8b63a5802ab25c4cfe78e6905f132e0
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/aws?keyword=aimesh+review+ac3100'. The ML classifier also flagged this PDF with high confidence. The document body contains the same URL, suggesting the primary intent is to redirect the user to this malicious site, likely for further exploitation or phishing.

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=aimesh+review+ac3100 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f9efaf825290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5f94c97810f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f89535201cea.pdfIn PDF document text
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/4647236.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/muvov-bitive-dukax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8c931086e09.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/7563180.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/2dc2a905509c51.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/zuxadol/layla_candra_malik.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/51565487154.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/zenoluxenona.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/jitabetuwilukesox.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7C 5504 bytes
SHA-256: 386506b3571aa88d90b4c881d8a8b60a9782b669e7ce3f8883dbaf61cce0d1ba
font_01_sfnt_off0000b01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01E 10556 bytes
SHA-256: 56442714db95c7cc19f209a4240122ed5632c02644dbe6f7083f8e6e4c4f889e
font_02_sfnt_off0000d44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44E 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8