Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db47df233735e88…

MALICIOUS

PDF

45.5 KB Created: 2020-10-21 04:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d62d9520ca1e5f094ba6a223f057b5b9 SHA-1: 27ea94bc9d33fb8852ca28ee27acf42f5f2a78be SHA-256: 4db47df233735e88bd4e841f2c833876441ee0fd338047c02add7353529f2123
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a redirector URL, indicating an attempt to lead the user to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary URL is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit vulnerabilities or trick users into navigating to harmful sites, likely as part of a phishing campaign.

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 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.
  • 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.me/123?keyword=test+para+medir+inteligencia+emocional+pdf In PDF document text
    • https://vixeroniwemeful.weebly.com/uploads/1/3/0/7/130740086/501638.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/podopiribaregijafej.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/womuzegetoku.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/mufodexij-bepafakinagusel-subutaritatuj-diwubozora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f89e3ac34193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f88b95cc4c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f89e5439723f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8737f31dd6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f882c072dfd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f8b3b8af3b60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f8a867d1dda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5f8bd0e4bd3fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_5f8f61842af44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8b150f0e5db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f87bb8c819eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f87f67f6dde1.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/46fe10cf-67db-47d0-b451-bf9004bcd330/92851058256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbccdc1a-bfac-4d56-9aaf-f47ed93325aa/gisufotojapuwokukobevepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d543c2a2-7751-4417-a553-f17f1b44ec4b/62750994000.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_off00006ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 5424 bytes
SHA-256: 336f50ecad968808933851df23fcf94ef79aed564abcd68a4e9e6ed46c04d2c2
font_01_sfnt_off0000811c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811C 11704 bytes
SHA-256: 3a488395a4b406b87f3376bf99c176630c4d4dc1a04a08712dd3a1f8be8b7a25

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