Malicious PDF — malware analysis report

Static analysis result for SHA-256 559bc3ed7f29bfbc…

MALICIOUS

PDF

39.5 KB Created: 2020-08-25 11:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d3586f8f35e19e5c188b9a5a21eead8 SHA-1: f39db90b314eed181b00d7aab3d4a5c70be4416c SHA-256: 559bc3ed7f29bfbcf058383ddceede93c6a47c8486d2a0ef99682ce2f6406256
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=kidney+function+analysis+report+card'. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to a "Kidney function analysis report card". The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting PDF files. The primary malicious IOC is the ttraff.ru redirector, likely used to funnel victims to further malicious content.

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.ru/pify?keyword=kidney+function+analysis+report+card
    • http://files.destinwestvacation.com/uploads/1/3/0/7/130739783/zaferewekinurigozu.pdf
    • http://files.r2wnt.com/uploads/1/3/2/6/132682883/6507232.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/80056169498.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/97707190838.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/chemistry_dictionary_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/27629129478.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/bularejefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/xesavewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/52999759675.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/7463556565.pdf
    • https://medlineplus.gov/lab-tests/kidney-stone-analysis/
    • 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_off00005e8e.bin
c9c9ccc21d469488aceda1e6bb34f49d4ef3c2b7a3604f2c9b4481bd2004325b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 5220 bytes
font_01_sfnt_off00007061.bin
e3ae535c80a032136e3f4952178a2075d36dc32cd32535887800ea19db44dad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7061 9668 bytes

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