Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9e8d466f666aac…

MALICIOUS

PDF

55.7 KB Created: 2020-08-11 02:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55f7e7cf1b488c6922f9c8a6aae9247d SHA-1: 28dea3900d7d57ced8dcd1b37215041289061425 SHA-256: cc9e8d466f666aac9af43be1ac203cb44a15ec46e0a9a5d48ff5e0ded3b9f6bd
120 Risk Score

Malware Insights

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

The PDF contains a high volume of external links, many pointing to what appears to be a link farm. One prominent URL, 'https://ttraff.cc/pify?keyword=221b+baker+street+game+clue+book+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to download further content or be redirected to malicious sites. No scripts were extracted, and the primary malicious activity appears to be the redirection via embedded links.

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=221b+baker+street+game+clue+book+pdf
    • http://files.windowwin.com/uploads/1/3/1/4/131438847/bejawa_fapadururatir.pdf
    • http://files.vancouvermermaid.ca/uploads/1/3/1/4/131406732/8660289.pdf
    • http://files.jamicurtis.com/uploads/1/3/2/7/132740951/3322187.pdf
    • https://cdn.shopify.com/s/files/1/0433/5704/4904/files/78587694253.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/artificer_handbook_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/81190165478.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/40897862570.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/kizukepifovutig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/96677738591.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0434/3942/3655/files/23667178170.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/kodewumekisox.pdf
    • https://cdn.shopify.com/s/files/1/0439/2674/9339/files/18488724045.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/fallout_4_trip_to_the_stars.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/toxixuripegojejifabami.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_off00009090.bin
b87189eabeee3cd9aa7c3444632bff8b081fe2d656986d88db6633465ea0a277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 5768 bytes
font_01_sfnt_off0000a418.bin
edd7312d13f032ccb7ad642a8ad9575881137daa20709da559e10098ce816b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA418 14888 bytes

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