Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b30b16e88c9b9e3…

MALICIOUS

PDF

34.4 KB Created: 2020-08-31 08:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38fbf409ed4ff4cfbf206aa212288a8b SHA-1: 7cc887abb5c5f6058d67a7458081bf0d3fbc6896 SHA-256: 3b30b16e88c9b9e3e66ed2035d7c1d6da1a9f210bfebcdea65af96396af1ae38
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is a high-confidence indicator of malicious intent.

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/wix?keyword=ickle+me+pickle+me+tickle+me
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/definition_and_characteristics_of_research.pdf
    • https://cdn.shopify.com/s/files/1/0428/4920/6439/files/48577898085.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/texejovip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/genetic_algorithm_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/posigeki.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/literary_devices_in_harrison_bergero.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/jakuvisoxe.pdf
    • https://cdn.shopify.com/s/files/1/0458/0048/9126/files/relgio_viceroy_homem_fc_barcelona.pdf
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/gopurevemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/65880231542.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/engineering_economy_16th_edition_solution_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/xasulobabusatugutabu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/holy_bible_chichewa_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/wezawadazajela.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/wepexolafitadagitulatoro.pdf
    • https://cdn.shopify.com/s/files/1/0459/8972/4317/files/sogivekazogeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/remembrance_sunday_service_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/lurezefas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b97.bin
56f931e84a8d8b6aa34ebfd88853bebc91c9fbf4e1547ec07fb888b9fc2d17f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B97 4596 bytes
font_01_sfnt_off00005b28.bin
677a3a7bdba7487ecb4aa086737c7705517dc40768c40c6d44fe836d5fe7f7ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B28 9824 bytes

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