Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e099f70ec7f38c…

MALICIOUS

PDF

54.2 KB Created: 2020-10-27 08:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 52d38ba4805f55907f39f5d25bbb8f47 SHA-1: 333fd406f4e1efaceab5861919cc143ec7de5bb3 SHA-256: f7e099f70ec7f38cab52bed2d9dae3ee639768319ff73a1a0448828ef3e677ae
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.ru'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external links suggests an attempt to create a link farm or distribute malicious content through a chain of redirects.

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.ru/123?keyword=butch+hartman+oaxis In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/potov.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/63a71.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/zijuzino-dotiwerosap-xigapala-tibuxen.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/xazurinixiniwiv-tiwerofunusaver-xatizivex-gilubes.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/9165264.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/movajuluf.pdfIn PDF document text
    • https://vepaxanejabag.weebly.com/uploads/1/3/4/3/134317352/xuzisobav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f2059b-49e2-436f-8626-7b819a56a27f/kikotirarute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa0494d-f223-46ad-a58d-46c3b22ec0ce/bumedaxozezutiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f779ca9-bff2-461c-9f1c-148f50853868/free_tagalog_bible_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86a9adb-ecd7-48f5-aa33-c4196add0dc4/kituvulapibukixawef.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/73487613841.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/wowok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/78496651732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/scratch_pad_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9007/4016/files/the_cavalier_hotel_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/5_manualidades_faciles_para_vender_o_regalar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/9729140346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9898/7414/files/funciones_trigonometricas_calculadora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1090/6519/files/thinking_and_destiny.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_off000093a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A5 5124 bytes
SHA-256: 1e65547ea32492295cb59eaa72b56e3db211b3e56251c1c571df9bc5c42f6182
font_01_sfnt_off0000a4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F2 11276 bytes
SHA-256: 1dcc0edb61db50dce0ecd6d4ef617a80547cee32c41bbf7095817f65a9928245

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