Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c45760e0f06721b…

MALICIOUS

PDF

44.9 KB Created: 2020-10-10 02:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e90367d84c00075c9fc7d39c08ec56cc SHA-1: 7206c6bb7f4bc6d87d2a8a6b4e414c1cfad7b2fc SHA-256: 0c45760e0f06721b808ba01d2676c7bb93654835cd8b3592e747f3cee7f3b762
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ggtraff.ru/strik?keyword=horror+movies+2006+best', suggesting a lure to a malicious site. The presence of multiple links on disposable hosting further indicates a link farm designed to redirect users to malicious 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=horror+movies+2006+best In PDF document text
    • http://files.antlerbakingcompany.com/uploads/1/3/1/0/131069766/4229262.pdfIn PDF document text
    • http://bufex.talentconscious.com/uploads/1/3/1/4/131408024/7301612.pdfIn PDF document text
    • http://files.gswlifenetwork.com/uploads/1/3/2/8/132815359/8302462.pdfIn PDF document text
    • https://site-1037900.mozfiles.com/files/1037900/19141715839.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/bufibiwigepolaja.pdfIn PDF document text
    • https://site-1040879.mozfiles.com/files/1040879/zoxotonotonesuj.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/90384605148.pdfIn PDF document text
    • http://files.heightscenter.org/uploads/1/3/1/4/131437806/3f7f6.pdfIn PDF document text
    • http://xarikafox.lewcoopergolf.com/uploads/1/3/1/3/131398222/6489d24.pdfIn PDF document text
    • http://jolakujuv.paigelingo2021.com/uploads/1/3/1/4/131483154/5e63adb93bce60c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f4b89b06-1d89-46fe-92d2-77093cb1a690/68273709105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0fecdad-2e1f-4600-830b-12559ff2e828/xojaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b962d25b-a81e-4231-978e-80241ea39b76/63331526394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1100ae-7f32-4cf5-b025-eb83a4a198ea/90916896692.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 4860 bytes
SHA-256: 778b40c7b93d932030359d61ff66987f99e2ed74a5ac635f9d50050dc8b14da5
font_01_sfnt_off000074b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B2 10616 bytes
SHA-256: 310fb754c8b37187dda08260403a8fc16e4b5a351b877c98f61239ab4a41db1f
font_02_sfnt_off000098dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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