Malicious PDF — malware analysis report

Static analysis result for SHA-256 09136e5ad5d1d758…

MALICIOUS

PDF

45.2 KB Created: 2020-10-28 01:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 60b45ac60dc0f56080434fb11fba5648 SHA-1: 6280e6e4b13b114a8819f4580ba86951191b99a6 SHA-256: 09136e5ad5d1d7581cb335f021e9861f5586be6e762cdeabf9a20c23d793751e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded URLs, indicating it functions as a link farm. One of the embedded URLs, 'https://gettraff.ru/strik?keyword=inflatable+speed+boat+for+sale', is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'inflatable speed boat for sale', suggesting a lure for users interested in such items.

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/strik?keyword=inflatable+speed+boat+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f9189a61cd64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8e09edbdc1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5f98b021bdee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f87bf766aa95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f944fa754caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f967be0d34f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5f913adec3f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5f938fe5dacbb.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/gosete/tizuvididu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4460/6630/files/the_third_secret_by_steve_berry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/9620/4442/files/3139984824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6962/9350/files/65722616670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7673/7955/files/windows_image_viewer.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/mcq_on_reflection_and_refraction_of_light_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/fegedogegiv.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/arthur_schopenhauer_kitaplar_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/forever_living_aloe_vera_gelly.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/agricultural_marketing_trade_and_prices_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/kudirerovipasewumonamim.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/ccna_security_book_by_todd_lammle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 4852 bytes
SHA-256: 3b925521e31fcc2ad1a44ffb051f9fd42162b994933a256e0152f6dc63e2c2d0
font_01_sfnt_off0000773f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 10000 bytes
SHA-256: 866243e19a73d819fc46532ccb74f0349d59def0c86b17facfb9a55a882b851a
font_02_sfnt_off0000996a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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