Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c2437256d98a20…

MALICIOUS

PDF

60.6 KB Created: 2020-08-21 07:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c9e396d6008ef57914ca7fb2be93b70 SHA-1: 61d4b7ccf071eb77cc46817e67ecee7748a898ef SHA-256: d3c2437256d98a20bf5f4ef77a856482831673feaa9bd34459378707514236c9
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.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to the 'Bonus Act 1965' and includes the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy to improve search engine visibility for malicious content.

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.com/pify?keyword=bonus+act+1965+in+marathi+pdf
    • http://vatako.davidlouismarino.com/uploads/1/3/1/3/131383309/1706099.pdf
    • http://files.ancestryquest.ca/uploads/1/3/2/6/132681409/50a804d.pdf
    • http://files.bluegooseregina.com/uploads/1/3/0/7/130775441/wuxoso.pdf
    • http://files.rinaldog.com/uploads/1/3/0/8/130874379/f4fde0f0893.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/76159101495.pdf
    • https://cdn.shopify.com/s/files/1/0428/6450/9094/files/aashto_green_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/laser_star_projector.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/61629328097.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/33006478920.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/61082428346.pdf
    • https://cdn.shopify.com/s/files/1/0433/0828/6105/files/vlookup_example_between_two_sheets_xls.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/xogofadorelo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/xumotisul.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/6493909400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/712708712.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a103.bin
29b950afb9ed2e670e04483d6762357544aed9945fba09302f73b5924aa9c374		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA103 5660 bytes
font_01_sfnt_off0000b40c.bin
088ec1f80a65085578e1b00d8d3c410555e29d290fc168af907f87a45eaace76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB40C 10324 bytes
font_02_sfnt_off0000d742.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 4324 bytes

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