Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a27172dad52ed7…

MALICIOUS

PDF

44.8 KB Created: 2020-10-31 06:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 915349b0cdfbb9ef2cb6327cf144093c SHA-1: 70691ae4b63ca5dd9d5e28ea1b86a8a4ca08276b SHA-256: 44a27172dad52ed7f6f317b57be0b6c51c458234e35247550c637f3d0f7249e1
154 Risk Score

Malware Insights

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

The PDF contains a link farm of numerous external PDF documents, with one primary link identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests an attempt to manipulate search engine results or distribute traffic to malicious sites. No scripts were extracted, but the document structure and embedded links are indicative of a phishing or traffic-generation scheme.

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://cctraff.ru/123?keyword=valentines+t+shirt+ideas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f89e13d59b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f8cf0e69dc16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f9809d780400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f915f3e77be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f96ecf72e02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f88d12798d45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/pitelabitaro.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/balasevic_knjiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0061/5071/files/tijugamesubo.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/38030027681.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/sharper_image_ultrasonic_humidifier_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/bacteriologia_medica_basada_en_problemas_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/biology_form_4_chapter_1_notes.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 4556 bytes
SHA-256: 8e7e796026ae737cb0a0451f1899ffd847a16e87ed4f616d3e6932677fce6fa9
font_01_sfnt_off00007324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7324 10964 bytes
SHA-256: 26b9034c8275403b2fa46818f8eb68769b2467a7bcded26838da728ebd445c0e
font_02_sfnt_off000098b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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