Malicious PDF — malware analysis report

Static analysis result for SHA-256 1658ee505b6f8dc4…

MALICIOUS

PDF

39.3 KB Created: 2020-11-01 01:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 86649465cffd09eb71507f0a3300dce0 SHA-1: 83a4edce56ddaa534d9a5f4bbc06fd6b2ec2fcd1 SHA-256: 1658ee505b6f8dc4bd446427fbee5554eaae503d37927203f25658c9b96f93dd
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://gettraff.ru/strik?keyword=ecce+romani+pdf+download, is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

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/strik?keyword=ecce+romani+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426813/normal_5f9a9f22e0440.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/9944699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f9a1a1e56f89.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/98ca1d55-13d7-4d5c-9147-514adde4f598/75630662601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0241/2196/files/interpolation_and_extrapolation_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0884/1657/files/57319549093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f880c10-61c3-4384-a4f8-f294371fb4fb/jagukas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f23195-abc4-407d-a690-33bab6f959f6/99521204871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/fawisami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7783/6183/files/72607820595.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_off000059d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D5 5172 bytes
SHA-256: f64a61eb76a4ae53adf455f72596e7c47181959f87db32d2fe7e276a29b60722
font_01_sfnt_off00006b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 11088 bytes
SHA-256: 99445507e8c81ab40a10b8968ceb3e8c1f923d7e86db97c584c3f46048762624