Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae756352f4c3356f…

MALICIOUS

PDF

51.5 KB Created: 2020-08-15 08:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c2dd7fc50532e01648fb519fd17ead0 SHA-1: 33fa726a45b1c35738ded0a14cf99d3b4b0ef9f1 SHA-256: ae756352f4c3356f5cbeb30f608b2b2f136d7374ed17aa538db82c582f88ad37
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with the primary URL pointing to a known malicious redirector. The document body is obfuscated but contains the same lure text and URLs, suggesting it is designed to trick users into clicking malicious links. The file's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=cambridge+listening+11+test+1+answers
    • http://files.clearwaterlakemn.org/uploads/1/3/2/6/132681199/2580411.pdf
    • http://files.eventsafloat.org/uploads/1/3/0/8/130813643/juvojarokid.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/18505591305.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/99676798211.pdf
    • https://cdn.shopify.com/s/files/1/0430/8018/8058/files/41838733704.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/vezusetijavupawukexamoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/46700636145.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/xanuwuginirifirise.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/nitojaroba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/84312738396.pdf
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/mapifenasugavudakokatano.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/mudejezusimakabikef.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_off00008cac.bin
1bd81de0d1cd67ab23bdd69e2b9846fe2f13b9c4e443970a89c0b3edd4d132dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAC 5332 bytes
font_01_sfnt_off00009ece.bin
3aa0fd2636fee0aa6dee9d86d78bd2f4bbcec3d9c47fd1b9ea1c427c757e00ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECE 10256 bytes

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