Malicious PDF — malware analysis report

Static analysis result for SHA-256 d440f8500c8b0ee5…

MALICIOUS

PDF

58.0 KB Created: 2020-08-22 07:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50fd8b6275a68b91b698d093d4162be7 SHA-1: 50017e7fb4407bf261f0464a3bef8e7c622f3557 SHA-256: d440f8500c8b0ee565273d80bfd91184d79f021e2548c9d7fff3b3fce1e01889
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=autoformation+windev+21+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary attack pattern is to lure users to malicious infrastructure via deceptive links within the PDF.

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=autoformation+windev+21+pdf
    • http://files.violetconner.com/uploads/1/3/1/4/131412290/9cd8bdf9c.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/xavejotenevimivuritaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/46676323288.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/foolproof_academy_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/82679228666.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/67170051353.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/37705193775.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/xitofudiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2541/files/67667603130.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/balstica_interna.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/57681588615.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_off0000a1fd.bin
dfad65da67079a8b5dea9ee89a21446e38fe09087815b7b65038f4b5247e0c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FD 5304 bytes
font_01_sfnt_off0000b40b.bin
f5209846c7a70ce2f447b1c2943c3d861103a4ddb22703dbc1c5d757f5065ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB40B 12288 bytes

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