Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e3c97a82111179…

MALICIOUS

PDF

68.0 KB Created: 2020-08-22 19:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 672cd90c043c2e5ad7d3b15d58f3b173 SHA-1: f7d39aae0497e6cc76d5ca71c5e1470b53828a04 SHA-256: f1e3c97a82111179d33283123077b09a80a53b19759a4e633d861ffb504224f2
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, pointing to 'https://ttraff.cc/pify?keyword=left+handed+calligraphy+practice+sheets'. This URL is presented within the document body, disguised as a link to calligraphy practice sheets, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, though most resolve to benign Shopify domains. No scripts were extracted from this sample.

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=left+handed+calligraphy+practice+sheets
    • http://files.lawyer-netherlands.org/uploads/1/3/0/7/130739251/930940.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/41569398306.pdf
    • https://cdn.shopify.com/s/files/1/0460/2514/6527/files/are_coroners_reports_public.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/xafizolimagatefixevaxif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/12993023281.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/genipadasipusebatuxalu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9517/files/nezadoseteridomore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/how_to_get_twitter_css.pdf
    • https://cdn.shopify.com/s/files/1/0430/6475/4325/files/73785394030.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/42587629070.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_off0000c263.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC263 2828 bytes
font_01_sfnt_off0000cc5e.bin
e2da46448e660f09e3a546c47946536dfcf3692080f77700794036b73a3ab54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5E 5460 bytes
font_02_sfnt_off0000deef.bin
5618e235178dce7920a59438a009c66b8adef00db95d11a89f313185508f852b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEF 10832 bytes

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