Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ee75870420b985…

MALICIOUS

PDF

42.6 KB Created: 2020-10-15 19:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c5f655d4031c32f660882566d1095f7a SHA-1: a5535bb31266a156d4bac86b9610c448ffeccd53 SHA-256: 16ee75870420b9858463b2ace7aa650b5be3ed0487f490c9e65df778dc43c852
94 Risk Score

Malware Insights

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

This PDF document contains a link to known malicious redirector infrastructure, specifically `https://gettraff.ru/123?keyword=neff+built+in+double+oven+manual`. The document body, though heavily obfuscated, also contains this URL and other PDF URLs, suggesting an attempt to trick the user into navigating to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/123?keyword=neff+built+in+double+oven+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f873a7c7f09f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8844be0a431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f88405125736.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/9389482817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f87c8c096efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f876b54047c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f870cbf94775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8724e0c6b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8814c98cf80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8863aa5b431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87feb621fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f87110f54319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f87b77bf30e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f886dece27db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f876677dd9bd.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/943eb069-fa78-4e06-838a-08b669a532d9/sudefus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b081067-d7c5-4fb0-b756-b54f7d2a0bad/82808824517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e00007-bdd9-48ec-a49b-3b36cbc24829/38328764.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_off00006aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 4948 bytes
SHA-256: 11f2e9ef824812559bc4349b48e1f278c261cde16130637e2f175e2abc94e850
font_01_sfnt_off00007b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 9908 bytes
SHA-256: df56cd72b23d0c48ec09a7d97e93ecbaaf1c3425254b4aa930dced72d73d8d83

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