Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2b1dd0e78f08b6…

MALICIOUS

PDF

35.2 KB Created: 2020-11-06 02:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0d47c712e11e6db73d1cb452113acce0 SHA-1: 84dfc2ce45e1a394b6f8823a296bb97428e5f452 SHA-256: bd2b1dd0e78f08b6261cfdae93fc2b271fdbf95ee4d12be00bf561f48cc48a33
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body and heuristics indicate a large number of external PDF links, suggesting an SEO spam or link farm operation. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to drive traffic to malicious sites or potentially phishing pages.

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://traffine.ru/123?keyword=ponderosa+high+school+in+flagstaff+az In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5f87bc28481ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_5f9544dd69a3a.pdfIn PDF document text
    • https://zojajodasu.weebly.com/uploads/1/3/4/3/134354616/zuvafo_noributotiz_bobaret.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/bozukewam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fa4826a06e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5fa01d4bc2c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fa453501736a.pdfIn PDF document text
    • https://dewufixibofapez.weebly.com/uploads/1/3/4/5/134596153/bivikemetij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f877003cf4a3.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/5701016.pdfIn PDF document text
    • https://melokiziw.weebly.com/uploads/1/3/4/6/134669089/39dbd4dec.pdfIn PDF document text
    • https://ledekatibawe.weebly.com/uploads/1/3/4/2/134265754/1464450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f9d20ea08ea9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00004a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3B 5336 bytes
SHA-256: ded76d34ccb42b5b01688202f047656835fc58148a023b596773a4658899547e
font_01_sfnt_off00005c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C64 10632 bytes
SHA-256: 3dbd751d669636540a0ade323f834582d95029f7c7c59656035448485da1abc4

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