Malicious PDF — malware analysis report

Static analysis result for SHA-256 59be2ea4090a37a5…

MALICIOUS

PDF

42.6 KB Created: 2020-10-31 19:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 95c4a1416849c4c91ea03eecc24eca0f SHA-1: 7b27c195d08b5d78ddd1dc8f58504ab1c48915a0 SHA-256: 59be2ea4090a37a55a094e1ca4da044957a62ad86ebce62cae8928c70ba52965
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, with the primary URL identified as a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to lure users to malicious sites or potentially for SEO manipulation. No scripts were extracted, but the sheer volume of links and the identified redirector strongly suggest a malicious intent to direct users to 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://ggtraff.ru/aws?keyword=iron+horse+armory+rockledge+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f86f4af36413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5f9d939271782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5f93b2500ef06.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/1481800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f88b0361faad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f8ba1a94d660.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/d7d3b179ef424dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5f9a3125db846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f9c98bb231d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f8e1b8c301bd.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/tejeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5f9b06cd1e729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5f8efc1c8bc2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f9824249d8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5f9ac7a50d05c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f89752ec0a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f972e75a7709.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F03 5592 bytes
SHA-256: be33a76186dbe68d6073c6229c5e534747ebd22e8b61ffb46acc7713161d9424
font_01_sfnt_off000061e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E2 11208 bytes
SHA-256: 55c005d92dff3e0c36c2c2b9d6e3e65c70773e211e4b0d15480460b1a7460676
font_02_sfnt_off0000875a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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