Malicious PDF — malware analysis report

Static analysis result for SHA-256 285d0efaf624c618…

MALICIOUS

PDF

38.3 KB Created: 2020-10-31 00:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4f94d718e16ea2e45323d52974fe6a4f SHA-1: 9535ff6d86c4f6485699963080829ca5edefc175 SHA-256: 285d0efaf624c61825325efd6d8baafeb2148a17cdf53f5fb0f57235258dd601
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the presence of numerous links and the ML classifier's high confidence point towards a malicious intent to redirect users to harmful sites.

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.me/123?keyword=d%2526d+magic+initiate+artificer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5f96c03ed407a.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/3a17cb8af1bfd7.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/dalofa-kanezawarejosu-kasifawi.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/a683c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9355/6893/files/64854226891.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/aperture_magazine_download.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/nozotimujadixixutilu.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/ehlers_danlos_diagnosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7115/2023/files/lord_of_the_flies_chapter_6_annotations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080d7558-3f18-48ab-9791-a841b4338ac9/north_museum_of_nature_and_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8340/2909/files/78037269909.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/english_textbook_year_5_kssr_sjk.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_off00005ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA5 4156 bytes
SHA-256: 9253c4ec90eb8b217ae91b3aef6412788d3d1419415539c5cfb70110cf842fd1
font_01_sfnt_off00006ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD3 10048 bytes
SHA-256: c8ede0e2a4f4f9c551d3d5d6ba8a6377211d9096fcdccc89dcb23e3e08b9cf6d

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