Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9cd0c3b8c0b09e…

MALICIOUS

PDF

43.3 KB Created: 2020-07-09 23:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 1371ea44cdd199a7c2de04ca604a65f8 SHA-1: a4abb0ccfa86182d0a434a1580872fc0ff28b866 SHA-256: ce9cd0c3b8c0b09e92f576220438ef38907bfb5bfe68de7f1483f6cbedaa6e51
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary link, 'https://ttraff.ru/wb?keyword=el%20neoliberalismo%20libros%20pdf', is identified as a malicious redirector. The document's content and structure suggest a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.ru/wb?keyword=el%20neoliberalismo%20libros%20pdf In PDF document text
    • http://files.emirhrnjic.com/uploads/1/3/0/8/130813531/1218481.pdfIn PDF document text
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.pdfIn PDF document text
    • http://files.atmltharris.com/uploads/1/3/1/6/131636737/db8772bee.pdfIn PDF document text
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdfIn PDF document text
    • http://files.unwindhealing.com/uploads/1/3/1/4/131407629/botilajaxagamulalaf.pdfIn PDF document text
    • http://files.davidthornecri.me/uploads/1/3/0/7/130738806/kopekapokaxize-niketolatini-tugegosaxa-powamesezusifak.pdfIn PDF document text
    • http://files.collegeidcamps.net/uploads/1/3/2/7/132712514/lunibab.pdfIn PDF document text
    • http://files.onyxfuneralplanning.com/uploads/1/3/1/3/131380413/pofadajigivep.pdfIn PDF document text
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdfIn PDF document text
    • http://files.talico.com/uploads/1/3/1/3/131379774/bf9852a2bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://buzuboxovova.files.wordpress.com/2020/06/31126387533.pdfIn PDF document text
    • https://reginefu.files.wordpress.com/2020/06/gamebalokiwidowipitifit.pdfIn PDF document text
    • https://tuvelajago.files.wordpress.com/2020/06/85193323039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutuxajaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 4992 bytes
SHA-256: 38be268b85c420a7a32f3032792cab61f5132a8140a74bb26cd1750cb4b00b6c
font_01_sfnt_off00007882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7882 11796 bytes
SHA-256: 3b7ab5f717245afa579ee1d3c0ea993ca87f4fb24cf2780fafba9e9b955c2e49

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