Malicious PDF — malware analysis report

Static analysis result for SHA-256 511e7392dc24464e…

MALICIOUS

PDF

41.1 KB Created: 2020-08-18 21:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f4726ed06b4e2d366c92ac0c2d459a SHA-1: c2bfc2c6763e6ffa83cf83378ea7cf063b7802ad SHA-256: 511e7392dc24464ea7130219ec69b005003d63b823ba5c6b121892f1c38ba562
128 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.ru/pify?keyword=sinusitis+antibiotics+guidelines'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a deceptive lure. The primary intent appears to be directing users to malicious infrastructure via the ttraff.ru domain.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=sinusitis+antibiotics+guidelines
    • http://files.alexbuehler.com/uploads/1/3/1/3/131384663/eb5eb8fff4.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/guardian_druid_bis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/pujutitilapamuseverefogeb.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/durga_saptashati_lyrics_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/gijolovigo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8640/files/rigumarotoxikowinuxixum.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/69757804354.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/odometer_disclosure_statement.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/34774281879.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/33611052391.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_off000064f7.bin
58cd5441a8980fd13b9b3769355bcc6f7a36b0f5308cc3e660ec9e0f634004a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F7 5252 bytes
font_01_sfnt_off000076c9.bin
cc90fa33aeaeba999a43efe4e58cfac686b5fe4b194215c9c1ddb33dc21c81f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C9 9780 bytes

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