Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56eadad947eee5c…

MALICIOUS

PDF

43.5 KB Created: 2020-11-07 07:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b97ec3ebadbb29cd57452b8b013dd3e0 SHA-1: 3b980e24695bdfabf74c6261f4444f01f15d6e5d SHA-256: d56eadad947eee5ce07979c573e859a4685020c5bc85596c2107df4e952bf0c1
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous links to external resources, forming a link farm. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to these URLs, suggesting the intent is to redirect the user to potentially harmful content or facilitate SEO manipulation for malicious purposes. No scripts were extracted, but the presence of multiple embedded URLs points towards a phishing or redirection attack.

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://cctraff.ru/aws?keyword=most+famous+dance+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f9a3093a1431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_5fa5db36c5220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f916ff0f3111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_5f9e500c62987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fa21517e5140.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/f5320c0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5fa34c7b5c070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wibanerotip.files.wordpress.com/2020/11/61772235626.pdfIn PDF document text
    • https://jawozegeru.files.wordpress.com/2020/11/derubolelojat.pdfIn PDF document text
    • https://rexebob.files.wordpress.com/2020/11/93856419077.pdfIn PDF document text
    • https://pomutap.files.wordpress.com/2020/11/sky_high_full_movie_in_hindi_free_download_300mb.pdfIn PDF document text
    • https://fufepekizuxo.files.wordpress.com/2020/11/pelapibujebefogobilexano.pdfIn PDF document text
    • https://kizikobir.files.wordpress.com/2020/11/sisterhood_is_powerful_book.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_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 5216 bytes
SHA-256: 93060051327671bfb4f676ec8c09eff3267a06988d0f4e3a48a9f5b27714b1f6
font_01_sfnt_off00007e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2E 10540 bytes
SHA-256: 0cc5913500be4546c69ef1847598a56056490305f5870f02b79d3060b5ba853a

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