Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ddbc788461bd47…

MALICIOUS

PDF

77.0 KB Created: 2020-08-10 00:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33ca6f9693eaf22bde5321de3ace0cb SHA-1: 532e539106215661c81f04f39af8d0b939c4eb45 SHA-256: e4ddbc788461bd47521a8cf4761ae479af77d7d242ad40bbd664b2ec935217a1
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm designed to distribute malicious content. The embedded URL 'https://ttraff.ru/pify?keyword=contraceptive+methods+and+side+effects+pdf' is a primary indicator of this malicious redirection. The document body, though heavily obfuscated, contains references to the same URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=contraceptive+methods+and+side+effects+pdf
    • http://files.summerswebdesigns.com/uploads/1/3/1/0/131070434/tuwogemilagabufumilu.pdf
    • http://files.jaksbakery.com/uploads/1/3/0/8/130814868/fawugidaxu-negarabiwivom-rorozejururomom-wurewa.pdf
    • http://files.polyroidcattery.com/uploads/1/3/0/7/130775830/juxojev.pdf
    • http://lubawa.rubrecordings.com/uploads/1/3/0/8/130814328/monumupobomoralu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/30475757359.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4437/files/air_pollution_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/hp_laserjet_p1102w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/91474031353.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/bozaxarifesalom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/52159435718.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/womopaxoreb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/97372049243.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/sizigimexazoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/zebegis.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_off0000ef4d.bin
2097cc6a02d8491da9980e701acf7aec733223aa5c1bfe87c50f3ef20ceba554
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4D 5328 bytes
font_01_sfnt_off00010147.bin
c043747e62ebb1634a175eba4ff50ce05e93926eb6a0cdb214786d8567db42ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 10892 bytes