Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3539decd302dec…

MALICIOUS

PDF

49.8 KB Created: 2020-10-25 01:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dc4f4cef5154c355af7175221d9f7737 SHA-1: 2a1301fb0194ec7b5bbe9afa7e2b47c6d83fcc28 SHA-256: cd3539decd302decd21226eaab6844a7c3dfbbbb27542738303427ae6cb21590
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ggtraff.ru'. This suggests an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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://ggtraff.ru/strik?keyword=les+figures+ret%25C3%25B2riques In PDF document text
    • https://xubikorapaja.weebly.com/uploads/1/3/4/3/134335605/7cc792.pdfIn PDF document text
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/gogatura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f9311b3cc305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f949d7a4da41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5f8fc01e33f76.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://cdn.shopify.com/s/files/1/0499/1595/3310/files/98620384914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/tour_de_france_2020_ps4_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/susomoronetakoxoxapunigiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6596/6231/files/fiwisujida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbb5678-04ea-4ae9-8b56-4b3c642b0da4/jilujagorerosuxufireliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bb95d6-5e1b-457f-8974-9ebd3f947ff8/dilazazupinal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b49bb8-1a1f-4e4c-bacc-6bd979371f0c/94873009571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b32c64-3b1e-4940-8281-255efeee9ce5/9450456464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d32d3e-bdd7-49da-bf86-5b56678be1aa/xifukitogemosakejududil.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/majeru.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/clinician_s_thesaurus_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/prism_and_pyramid_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/25762435354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/stremio_apk_for_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5289/8739/files/90037496853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3319/8498/files/carmen_electra_porn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4017/6793/files/61589768991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/bepeloxujolugagabas.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_off00007327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 4560 bytes
SHA-256: 6e308eeca4e3cf1d602ec20404a74d91813c8b7901294b5d012422c171b4505a
font_01_sfnt_off000082c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 12456 bytes
SHA-256: 0d1e261742ad21c6c19924de4b06ed21acc392364e64de6dc11a2ce8b0befffb
font_02_sfnt_off0000a9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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