Malicious PDF — malware analysis report

Static analysis result for SHA-256 098433a531b69c18…

MALICIOUS

PDF

47.1 KB Created: 2020-10-25 21:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 290bda4a7a064a5c5ce3a246dfcf92fa SHA-1: 9174a1911956674a91eb3dcd03b964b792e1d8cc SHA-256: 098433a531b69c189d6397290feff6b5930aca9a3ee338a50a26b47fd1976ea8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'gettraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other links, many pointing to benign Shopify URLs, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://gettraff.ru/aws?keyword=consumer+buying+behavior+towards+smartphone+pdf In PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/73ea4bdaaa8f.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/fojateb.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.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/1/0492/2844/7900/files/philips_humidifier_2020_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/86726462066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0114/7302/files/probability_questions_and_answers_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6980/0089/files/apc_back_ups_rs_550_battery_replacement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7864/0311/files/tunein_radio_pro_20.1_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2783c196-1c1c-431b-9728-78a24a842fac/2016_happy_new_year_greetings.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/cbse_6th_maths_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/57620867338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/9148/4833/files/9346186960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7750/8541/files/47423592587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/mastering_biology_chapter_6_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/vukapimil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5229/4055/files/31565286263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c816e04-709b-4de2-83ce-deb72ae5955e/79886422575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259c78d4-1249-474f-801e-3bee9b276408/jixufoxaladoti.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_off000073c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C5 5724 bytes
SHA-256: e3c5251aee8ba3833ac3524d4bee41f2b93e4a16cd0cdc2769585f91adc1be7d
font_01_sfnt_off00008728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8728 11996 bytes
SHA-256: 99dab2d2e55fd0d1c1cb030a1ecd621a620cba952869776bbf65c9bdec0d7ecf

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