Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a5007baae0fcba…

MALICIOUS

PDF

38.2 KB Created: 2020-08-15 14:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43e0e1c330164475b0f433058537795c SHA-1: cf767b63bcfaef0bcb26b6706e8bd444aabb8351 SHA-256: c9a5007baae0fcba59f7ea2605e83c3e50250f4da1c77ac79f8c32051c8192c9
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious site.

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/wb?keyword=equilibrio%20termico%20pdf%20unam
    • http://files.decksbydecamp.com/uploads/1/3/1/3/131398036/wunotonid_redewaf.pdf
    • http://files.peequality.com/uploads/1/3/1/4/131437037/lixajimibevinow_sebumik_levatikuli_guselowazotineb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/kijapugogujupug.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/noves.pdf
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/99688938679.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/gebumupebatukupugubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/pijasogiboz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/kiwewezadaguwil.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/pazarosegaxulodoriki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/binunegedowaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/vikefuluxafoja.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_off00005820.bin
2a2668c8cbf00b5a2e8d8033838c0d86ce5d52ab39aa2ce262ecdbef9d590598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5820 5348 bytes
font_01_sfnt_off00006a2e.bin
8159927f4f9c7abc5d6c894186fb49323b07da929441dc0cb860c95a0d273d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2E 10016 bytes

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