Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a7efc7e3576213…

MALICIOUS

PDF

51.8 KB Created: 2020-10-24 13:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 08aa05e2b5ce6fb80719d05ca7feaea3 SHA-1: e2011fc7eb78034dc4ef7c8b8644e832c1be3a39 SHA-256: 57a7efc7e357621334d5c963d60dadbfafe9ec5b2210b845dee6bdce97269a23
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ttraff.ru/123?keyword=los+filosofos+griegos+guthrie+pdf, is the primary IOC. While no scripts were extracted, the PDF structure and the malicious link strongly suggest an attempt to lure the user to a harmful site, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/123?keyword=los+filosofos+griegos+guthrie+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f86fb643bf27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5f93c15232e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f89098e2473b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f920dcb4ba1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f8cea2919b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f8950ec7dbe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f8f4d1359aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_5f91bc8d0a5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f9389e825320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/187d20d0-5cfd-4cae-96ce-dd0a18f1248c/89304017267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5238fde5-fed3-4add-a24a-de425543490a/47092123121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f444485-a294-4af6-858b-fdcaa54b23f6/11687085560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c40b7c-481b-40b0-9826-8bbd11a03032/samekanapofaparinixedon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29322733-c624-48b7-afa3-9de1a96a80b1/41958925242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b187b49f-30f1-49c8-b0f6-103a31c109f9/feburusevepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875312d0-9a20-4088-8a10-88e3f8db2ff3/sony_bravia_850d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8a5605-15b6-47b5-9e57-4580b28fe108/4023944413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2553d4e-def3-474f-8fd3-5b22e0fc362e/70693002790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501c2de2-1f9a-48ec-ba7c-0edda2a46051/civ_6_random_seed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14034dfd-faf5-4007-922a-c0f899f3e376/download_midnight_club_3_dub_edition_psp_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a274d30-c4eb-4ded-98b6-3920c3527d3a/xerunorep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795e1849-4e75-438f-8e25-fd94ba8e35da/54368474469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854d186a-b46e-4c4b-bcbc-cecc15fea30e/90844811545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06b32e2-1a71-49ad-859f-326b056a5c93/sutipirusizadobujawikexur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63efb283-0b50-4e11-aa6d-6ac1809b1fee/63049592292.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_off00007e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 5036 bytes
SHA-256: 97bd25d0efcb11e74087886686f3c476ae81261efa1d1d7f739cc060a7e98f78
font_01_sfnt_off00008fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000982f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 12140 bytes
SHA-256: cba893aad3ac1ce1dcc7135e56ae08d0b4bac73447785be556247490b2008054