Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13efefefa41b63a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 09:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34c2979a31c28e9d03bd854be282aab SHA-1: cc3a0c0c906e6d61b9ee6d6ebd23d7a9814a66ae SHA-256: f13efefefa41b63ad6fb6832a844deff7ee18b1963333f75443a30aedb230847
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an SEO poisoning or link farm tactic. One critical heuristic indicates a malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to medical terms and technical application names, likely to appear legitimate. Additionally, heuristics indicate lures for clipboard command execution and callback phishing, suggesting the document aims to trick users into executing commands or calling malicious actors.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=falciform+ligament+flap+cpt
    • http://files.hvgpc.com/uploads/1/3/1/4/131453214/gawov.pdf
    • http://luziw.sunningdalehomedesign.com/uploads/1/3/0/7/130740596/7092270.pdf
    • http://files.kristinbruni.com/uploads/1/3/0/8/130814633/a69a94b6.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/36592706351.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/belolosefuti.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/big_little_farmer_apk_mod_free.pdf
    • https://cdn.shopify.com/s/files/1/0452/0817/4743/files/99236814013.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/computer_ergonomics.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8493/files/sebidanifobepodomexezer.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/52902265678.pdf
    • https://cdn.shopify.com/s/files/1/0447/9637/9285/files/xamij.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/54554901709.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/51840180466.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/58703332382.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/daffynition_decoder_algebra_with_pizzazz_answer_key.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_off00006338.bin
ee47fc78981ea5ce2409e7ebc0159b263885de279c4c9bc7e08910d42370bba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 5112 bytes
font_01_sfnt_off0000748a.bin
a5d086368ce283c6f1546a621403fb6d1ccf7a41541f254dc38d41f3eaa63fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 10488 bytes

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