Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82a82cb0a50f59f…

MALICIOUS

PDF

72.1 KB Created: 2020-08-23 19:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6ec2d66bde33c0f13e8814fcdb3ade SHA-1: 0dc1729336f65390fdbeb69514e289259c63a3b9 SHA-256: d82a82cb0a50f59f3ba796b719eacbd6a6fe139a90d9c13daf0b24c98e1e8956
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=livanova+annual+report+2018
    • http://files.priscilladisla.com/uploads/1/3/0/7/130775137/6272198.pdf
    • http://files.cdostem.org/uploads/1/3/0/7/130740429/7d7900b8cae6.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/20418529844.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/nijil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/56935584162.pdf
    • https://cdn.shopify.com/s/files/1/0444/6945/2967/files/geometric_tools_for_computer_graphics_download.pdf
    • https://cdn.shopify.com/s/files/1/0465/2407/2086/files/ldaptemplate_search_example_spring.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/davumasozimutazop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/radiestesia_cabalistica.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/50080562172.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/budapest_tram_map.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_off0000d3cd.bin
77026fa9633c1bb09d9de72e59a742301db8c2d4e8787407590528ce587ed486		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 5156 bytes
font_01_sfnt_off0000e56f.bin
2f83387e5157db68e11d9e73db5297debbc429b9616e0874ee601c0c7cab4995		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 14784 bytes

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