Malicious PDF — malware analysis report

Static analysis result for SHA-256 9594d5f618853c4b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-20 10:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a910c32be7e604d8a2632125cee3487 SHA-1: 5715f017e003a0bb4f287a02620a34b66e57f6bb SHA-256: 9594d5f618853c4b26ada5610a83e2712ccca96ea8b05e1edca66c14a2784b71
150 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.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL and references financial terms, suggesting a phishing lure. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=balance+sheet+insolvency+test+uk
    • http://files.wycombe-toilethire.co.uk/uploads/1/3/1/4/131410012/nukuv.pdf
    • http://vivijuvel.alanvicary.com/uploads/1/3/0/7/130739290/a40809a3b57.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/61692425398.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/42793532970.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/mtv_s_amp_songs.pdf
    • https://cdn.shopify.com/s/files/1/0452/3845/2381/files/adjective_worksheet_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/19951412340.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/73528006216.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/77826180676.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/burlesque_performance_funny.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/kowerafaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.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_off0000688a.bin
3b321b121a010f26ebc6763ebb2e2925b49f8c60ffe903774654d7ee3711ef94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688A 5068 bytes
font_01_sfnt_off000079c5.bin
12cf0e191a77cdd28b42d49b9329f1d2e81f249e34e670a7f229f68c102fff7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 9876 bytes

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