Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd49998be625383…

MALICIOUS

PDF

34.6 KB Created: 2020-10-20 00:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5da213daf9be04f02cfb7f7522720e38 SHA-1: 55134b6be78a228c72ffceee23473204d254865f SHA-256: 2cd49998be625383623379385f6fda14fb96a278c05aaf502e286bfd392ae13d
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link, indicating an attempt to direct users to malicious infrastructure. The document body text, though garbled, contains a product name and URLs, suggesting a lure for users to click on these links. The presence of numerous PDF links and a critical redirector link firing strongly suggests a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.club/123?keyword=under+armour+sapka+%25C3%25A1r In PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/ac1e7b346f228.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/gipuvuku.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/e4abb6a56dc.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/6166776.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/c0e490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8704ba7ffb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f889e97ca4d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f8b7e0e993e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f89c75475b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f88813d4155d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f87df0e48748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f87437793428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f887658c78d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f87d4a70e273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f88ec003d1f2.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/acea50db-35bf-4687-9232-8e29cca5e3a8/mugitaleba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3be731-d2de-4922-b5d2-220bbd9594bf/lilolov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3a91bd-954a-43fa-930f-e94cbdff3f3f/2504246180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee16a70-7a6d-4fd1-a731-912424081d5b/buruzuravek.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_off00004a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3F 5364 bytes
SHA-256: d4cf383f5e4a9ac8f700e6f735dc622258818506a222c399f6ec22f2212ca113
font_01_sfnt_off00005bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD9 9592 bytes
SHA-256: 907b38215380ec78e1dd7f62f9eef86e0d5a774c10fa977173f3f544ffb1a076

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