Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff2d56a03c672b2…

MALICIOUS

PDF

43.7 KB Created: 2020-10-30 06:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6982e725372164bcb3ba3d2ef47bd07c SHA-1: 9a925301df7fae16616d70ef18208493cc816682 SHA-256: cff2d56a03c672b2c123a6a5efccba3224dfd91c50f1d9de3654829773e74838
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a malicious redirector link that appears to be disguised as search results. The link points to 'ttraff.me', which is flagged as known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking on a potentially harmful link.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/123?keyword=hunger+games+exasperated+remarks In PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/posag_gefaf_kogoziluz_guzevolugofidex.pdfIn PDF document text
    • https://xisegebimir.weebly.com/uploads/1/3/4/3/134340076/2049655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425005/normal_5f9b744fc0cac.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/954756.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/407378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403561/normal_5f98dd24daae6.pdfIn PDF document text
    • https://jejoduruledeg.weebly.com/uploads/1/3/4/3/134396934/38a1a435951fd.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/fapaga/pifusezujuxifanusedegat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4451/8043/files/79413695835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9484/4587/files/pet_sentence_transformation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3803d8c6-6b0b-49ad-81e3-c2642c0ed960/zevoniviravis.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_off00006a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8F 5340 bytes
SHA-256: 4c6334a748db41add1a89a1bcabfa8895a6d9b525a95c662925df0dbd18d44ad
font_01_sfnt_off00007ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA9 11072 bytes
SHA-256: e921d75c7dd23fa935a9a665b8bec03d1cb391ff2b81db0317677f90f325f7b6

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