Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbc8551fbc042b8…

MALICIOUS

PDF

44.3 KB Created: 2020-10-26 06:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1584c2eca00bd193ed9be7de204a9050 SHA-1: 37743589bc9d4c4d2a8b270ae3388b9c2abeafbf SHA-256: dfbc8551fbc042b8e9cd78c74bec625fac4a4de36cef0686b1ed1926bd81b63c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.link/123?keyword=new+york+times+innovation+report+pdf', is flagged as a malicious redirector, indicating an attempt to lead the user to a harmful destination. The ML classifier also strongly flagged this PDF as malicious.

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.link/123?keyword=new+york+times+innovation+report+pdf In PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/tupebisupe.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/dixarozobid.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/karagovog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8892197d968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f8e376671116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8dc2050df35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8b055162616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5f95fed23785b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f917419769bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8be2133b4f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f95145fece1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2906/1542/files/iflash_drive_for_ios_and_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5114/5120/files/36807181259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d9fb81e-e5a2-4603-9eae-4cea056400ae/puwupasizosanowetovefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547d8ced-d7d2-404d-8286-c4ce67a3ffda/93158647661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/zoget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/4501665186.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_off00006d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7A 5440 bytes
SHA-256: 57459d57c1d57b04daf86900a08735bc00d402aa393014a32fc8397341efcc89
font_01_sfnt_off00008008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 10468 bytes
SHA-256: 6893fa73bd20eedd0732ba3789bbd6e0374c5aff0d86017a477391ef541fcb11

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