Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13645797e5e5b11…

MALICIOUS

PDF

47.2 KB Created: 2020-08-07 04:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f220d721101137a6674093591e4f71a SHA-1: e71db4520e7b227bbf8d7771ad8eaa0508519652 SHA-256: c13645797e5e5b1137afeaf3b840de3717fff0f6b912fdf76bd223daf57bfff9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The primary malicious URL is used to redirect the user, likely to a phishing or malware distribution site.

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=child+labor+law+employment+certificate.+pdf
    • http://files.fea-florida.net/uploads/1/3/0/8/130814717/2ca6e4a39c27d.pdf
    • http://files.biohaircarethailand.com/uploads/1/3/0/9/130969472/b7456997cf6f.pdf
    • http://files.langleycyberpatriot.org/uploads/1/3/2/6/132695851/teguvav.pdf
    • https://cdn.shopify.com/s/files/1/0436/5392/2981/files/xuzof.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/58897561292.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/49511574363.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/mapa_de_carreteras_de_asturias.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/butojepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/xavikusugufodadefixivaxif.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/hds_9_gen_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/vakiwu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/migok.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/39954151634.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3784/files/erin_andrews_net_worth.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_off00007a3e.bin
4c703e1973c248b03eab09ca836f5cbd4020aede92eed13f8dcc4142da95fee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3E 5488 bytes
font_01_sfnt_off00008cd0.bin
ab2123353e6fdc6769e377c0ee1e776a72a80935b0f0bbd0db66587e9a678621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD0 10324 bytes

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