Malicious PDF — malware analysis report

Static analysis result for SHA-256 692bf211d0a9731b…

MALICIOUS

PDF

58.9 KB Created: 2020-11-04 08:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 352b88b01af660433a36198162107011 SHA-1: 2bb16d13dbf34deda48ffc35d4a16e2cec1ab5b2 SHA-256: 692bf211d0a9731bbfecb6bc87ac91cfa5721cf04cd04a3211a2ade772b8f5d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm. The document body, though partially corrupted, includes the URL 'https://ggtraff.ru/aws?keyword=royal+high+school+edinburgh', suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports a phishing or redirection attack pattern.

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://ggtraff.ru/aws?keyword=royal+high+school+edinburgh In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9c73a1a0e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5f941ed3a7a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f925f084e06e.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/cce89719ee.pdfIn PDF document text
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/nafugavezun_naxaditumikal_joputokorupe.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/dudurat/bbs_rs_wheels_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa6fc04-f2ae-44a2-b67d-b851fb55a907/58869112167.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/westinghouse_high_school_mascot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d89fc3-92b9-4ea2-a155-a8b66b51a50a/49998715063.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/26080354099.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/free_iphone_xs_max_testing_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ea7bb-e233-4935-b903-b781a3b7de40/pexeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b7fd5d-fb20-4b0b-9bea-43e03efa9981/niwevejejatinigubesek.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/scottish_psalter_1650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324ff15d-7a22-4c66-9816-29bd3e71652e/75137462038.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_off0000a808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA808 5452 bytes
SHA-256: fbaccb57a9454429672c77d62abc79a019d1114c9306a07f02d1d09fa51c5ffc
font_01_sfnt_off0000ba92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA92 10752 bytes
SHA-256: 730dc5d98f1b07089fd0fbb3508d86ef25904afd218ebdbca92b06ccb0c3a189

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