Malicious PDF — malware analysis report

Static analysis result for SHA-256 b044cd811ea2b735…

MALICIOUS

PDF

46.9 KB Created: 2020-10-15 21:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 97a959727f5d41b8b072ee9bc1db2a56 SHA-1: f15b54749e0757abb9ceb66fe48e2f6fc73b3d39 SHA-256: b044cd811ea2b7354ddb07b7951811ab384c12d5ed9872b12f592912fccab929
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous links on disposable hosting further supports a malicious intent, likely to drive traffic to malicious 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 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://gettraff.ru/123?keyword=united+nations+economic+and+social+council+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/5b300b.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/945910647a4.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/lagorijudiwox-bunawuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8743276b498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8726b8ade3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8705e7027f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8730ff83a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f871a5624e9a.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/xetezarozoforaboron.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/vevojunalodewa.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/77429035c.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.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/1/0501/6682/5115/files/ejercicios_saludos_y_presentaciones_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66753c4e-e5a2-4817-82dd-46cd51dd1930/bokaxufazowakifaginuwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4717992-e00a-47a5-9039-2556a578a6c8/zabojarupogasijir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797bec67-c607-4c88-8398-d736175d31e2/mowoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf54de85-3c7b-4dce-94d3-42c527ad98e5/16195049377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bddcd9-e9b5-4509-a548-0df537e53d9b/verekozovupakukolibazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b31622-729b-4086-a1e3-12c34902ab14/32712769195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc3a140-8638-43bd-b306-cb7b66ab5099/madexaxaze.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_off00007734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 5196 bytes
SHA-256: c40586545e414b7c8977eb8f762bba6ece0a877fb63ad578666407b103e5de46
font_01_sfnt_off000088d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 10856 bytes
SHA-256: 58be1077754867d8a55182afb4c9b7bcf925e9de02d7b74bb311eeb9809ebab6

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