Malicious PDF — malware analysis report

Static analysis result for SHA-256 427745010ec50fac…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 20:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aae7a0c1f2f8f2e37c5964b02c34d99c SHA-1: 32b7358084badf4d8c850362928163bf8fc00a18 SHA-256: 427745010ec50face430676d623f2ddf5f5237b9ba6a5cd263e6b1088a6ce45a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=deere%20gator%20825i%20manual'. This URL is presented within the document body, suggesting a lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=deere%20gator%20825i%20manual
    • http://wifoxedif.furtherreaches.net/uploads/1/3/1/4/131453574/8151621.pdf
    • http://budojav.nyuasap.org/uploads/1/3/1/4/131406744/dewowuvegojagupibe.pdf
    • http://files.yooin.studio/uploads/1/3/1/6/131606666/suxuzemugiw-gediduxaxakidu.pdf
    • http://files.nativeng.com/uploads/1/3/1/4/131407445/siboko-durizuriwem-jusozizoxuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/16711855351.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.pdf
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/35495999155.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/65795728604.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/lusakoteseseledujupafasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/english_reading_test_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/44749979063.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/christian_philosophical_theology.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/fulejobaginubowisorovusa.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/migimesijefewaxar.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/pugivokigezo.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_off00005d0d.bin
8d9f0810f5f0048401cc29e10e7bf4cd6867ae2403715d7d358adb90fd621139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 5276 bytes
font_01_sfnt_off00006eec.bin
e349bc5a43a5b172c80b8c3b74ebe4ab0abdab783a48c23861f3d642d22b28aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 10856 bytes

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