Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3eaf6119b4f666…

MALICIOUS

PDF

41.3 KB Created: 2020-09-21 20:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 25c5f54c8b718beccfaee28882c760e8 SHA-1: 33f2626317730efa8c34f7f77777b08bfcd466eb SHA-256: ff3eaf6119b4f6662bca54fae3b9b44d7e39d9f6761d01a25c94f5cde62b94bd
194 Risk Score

Malware Insights

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

The PDF contains a lure for 'Power rangers ringtone iphone free' and embeds a large number of links, including one to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs points towards an attempt to redirect the user to malicious infrastructure.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=power+rangers+ringtone+iphone+free In PDF document text
    • http://gobivejev.bellamorte.net/uploads/1/3/2/6/132696048/legoxodixarin_pobuge.pdfIn PDF document text
    • http://files.simixagplus.com/uploads/1/3/1/6/131606260/5026856.pdfIn PDF document text
    • http://delulixop.holycrossparishet.org/uploads/1/3/2/6/132681260/9798679.pdfIn PDF document text
    • http://wazoxofa.lulalake.org/uploads/1/3/1/0/131069839/fevataxawa-takemelatemopej.pdfIn PDF document text
    • http://lepapuxu.rowenatuziak.com/uploads/1/3/1/0/131070161/dulizojupinenenuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a152968-c772-4794-9598-4c714be56ebc.filesusr.com/ugd/bc0d1e_6d68b4346b3a4440a5f620a60fa4962c.pdf?index=trueIn PDF document text
    • https://4cfb42d7-3be0-4a7b-9826-9bd15b932603.filesusr.com/ugd/eb6612_2b1fcd45d33c42c39879e13704328cd8.pdf?index=trueIn PDF document text
    • https://747a27fb-3384-4bd2-9e42-695da4257441.filesusr.com/ugd/1e4819_01520ca4ee6141e0a0fcf38cafc5fe64.pdf?index=trueIn PDF document text
    • https://afd25ecf-9ccd-4b26-b04e-ff86f1158725.filesusr.com/ugd/7ff653_09606dd7a3b14f739439e3c7e9574745.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/61850037894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/wajupitikekurawugoketu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/chinese_visa_application_form_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/kofumenevivilufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/78757431411.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_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 5224 bytes
SHA-256: 01debbfb4994894f8af3f4c55dc7e6334269a63b14062e47cd9aa97bd6d1c702
font_01_sfnt_off0000766a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766A 9980 bytes
SHA-256: 82ca252ff4862f9218a756dfb73f78e3196cfc6be55934ea414779afb8db3ae7

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