Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef775dcc14acc79…

MALICIOUS

PDF

44.5 KB Created: 2020-08-15 08:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2099358fc768b476e100f0f97f5330d SHA-1: 516c58444d021c62652bdaed81e6ab7ff2af9515 SHA-256: eef775dcc14acc79046ebe495b4ba1194c67ae94062e4e28264699e04f824004
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm, with numerous links to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or lure users. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting users to malicious infrastructure.

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.com/pify?keyword=audyt+bezpiecze%25C5%2584stwa+informacji+pdf
    • http://rodox.bikithikit.com/uploads/1/3/1/0/131070374/visuvu.pdf
    • http://files.johnstefanondesign.com/uploads/1/3/2/6/132682022/raremigemedarove.pdf
    • http://kewifoke.reedworkz.com/uploads/1/3/1/1/131164250/fcc00ab989951a.pdf
    • http://fituvobeb.heikesfamilyfarm.com/uploads/1/3/1/6/131607600/zufezikixeral.pdf
    • http://files.ecobathroomrepaircompany.com.au/uploads/1/3/2/6/132681308/e1e36c.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/wafer_paper_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/6904/5926/files/pegolejigukagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/slack_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/63238174076.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/balderdash_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/how_to_set_upstream_git.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/40154264617.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/baribezugejuveluga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4861/files/semomizegakesoxejasam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/81310740745.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/65429332354.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_off00006952.bin
3751f3b8f0aacdcdbaa5edfe6fbbf8278ac1b431ecf1ceefb10f3179ea3ce424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6952 5848 bytes
font_01_sfnt_off00007d00.bin
d97743c6b3b53a4ef3a5d68e626472521f3f7d054a4bb0baea060687d23bd9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D00 11996 bytes

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