Malicious PDF — malware analysis report

Static analysis result for SHA-256 21784578914bb123…

MALICIOUS

PDF

40.0 KB Created: 2020-11-06 17:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7656ca6132b4b13de39b0a476be1a6a6 SHA-1: bbbddaebbe7968de19918705295a32d1a3eec843 SHA-256: 21784578914bb1231f33d155336231543451cae343f96b55c8f59ef9e1a4442e
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate search results, redirecting users to the malicious URL https://traffking.ru/aws?keyword=cecil+texas+bbq+in+orlando+fl. This URL is flagged as a known malicious redirector. The document also embeds numerous links to other PDFs hosted on various platforms, likely as part of a SEO link farm strategy to improve search engine ranking for malicious content. No scripts were extracted, but the embedded link structure and the malicious redirector indicate a phishing or redirection attack.

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://traffking.ru/aws?keyword=cecil+texas+bbq+in+orlando+fl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8870eb2db9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_5f8bff3d00282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449411/normal_5fa18b9cdcb29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5f8cb710b236b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5f9cbe894adde.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/sisaxu/faweme.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xefofe.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b1c115-e605-42af-8465-d2d53ecc879c/mudoteko.pdfIn PDF document text
    • https://getalam.files.wordpress.com/2020/11/wazozavat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e072c48-8934-4711-9620-87ff7d73bf4f/pefenefez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7088fd0-3055-4a25-975b-0c46697a24d1/lavubovul.pdfIn PDF document text
    • https://sudufafi.files.wordpress.com/2020/11/95569674273.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_off00005ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE5 5252 bytes
SHA-256: ca8a3e8b25f54c2592edf4c45d827c24834e3a28a4a3ab28d6636ed083b321f3
font_01_sfnt_off00006eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 10920 bytes
SHA-256: 6e587fc9ddc84c512e3c360fe960bd0bfb848a0ee554701f108832c324a43cd8

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