Malicious PDF — malware analysis report

Static analysis result for SHA-256 181aae8cd39d1912…

MALICIOUS

PDF

39.8 KB Created: 2020-11-03 19:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b825ae11279298d587f53ba7c0684960 SHA-1: 67fd08f3f7c693a1b87d5149fcce1c012ee33b4b SHA-256: 181aae8cd39d191253926a489ec92e0f4d8e87ae56796ca911669a3fba618b57
154 Risk Score

Malware Insights

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

The PDF contains a deceptive lure, presenting itself as a search result for 'how many kids did angelina jolie adopted' to entice users to click the embedded malicious link. The link `https://ggtraff.ru/strik?keyword=how+many+kids+did+angelina+jolie+adopted` is identified as a malicious redirector. The document also functions as a link farm, containing numerous links to other PDFs, likely for SEO manipulation or to distribute further malicious content.

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://ggtraff.ru/strik?keyword=how+many+kids+did+angelina+jolie+adopted In PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/af108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_5f9faa706b91c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414682/normal_5fa1475c280b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f9d257ec1c00.pdfIn PDF document text
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/0523178536d5a36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f98865dd47f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/wudeniwuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03a4988-0037-41b8-bed8-cdaf6aba3947/sepiduwutasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9214/7869/files/xofuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02bd56d-be3b-49ce-a8dc-c21dd6e15067/damuladazedaweriril.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/wemepeziwuwuvunitowa.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_off00005c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C90 5476 bytes
SHA-256: 926de71f1bad00c963b159239f7069483dea2386b2dc587475f75f9b22886aff
font_01_sfnt_off00006f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3E 10360 bytes
SHA-256: cd30481a3a8fc68c1da522ad9854949b54ed4da584b21d06e40c83fddf59a435

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