Malicious PDF — malware analysis report

Static analysis result for SHA-256 de32c343fde8792e…

MALICIOUS

PDF

39.0 KB Created: 2020-08-12 16:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97befd7ffd9970dcf0fb7cf241a70f54 SHA-1: 19e0acc32168e4ff14804c4852d27f837e50b880 SHA-256: de32c343fde8792ef6e539a23a2ee2b3f2af655342af95638c0c78516175c095
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.cc/pify?keyword=kidney+stone+symptoms+in+tamil+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to trick users into clicking it. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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.cc/pify?keyword=kidney+stone+symptoms+in+tamil+pdf
    • http://files.andrewveivers.com/uploads/1/3/0/7/130775102/regimupurukixexewoto.pdf
    • http://files.doubletakeproductions.shop/uploads/1/3/2/7/132712505/27207d0834.pdf
    • http://files.daveparker39foundation.com/uploads/1/3/1/0/131070894/gusobomejadak.pdf
    • http://rubibi.brettstotalstumpgrinding.com/uploads/1/3/1/1/131164110/wejilepurapakan-nulegorulufapi-wagegitivezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/95663244118.pdf
    • https://cdn.shopify.com/s/files/1/0434/6062/4537/files/dolazinega.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/36262768024.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/37158473933.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/gujulawelokurojuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/17891638096.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8174/files/discord_bold_italics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/wafelusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/gepotiginivifowetem.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/96860702929.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/62319649296.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e23.bin
48c8dfe94d0e84c4abdf3be9cf07bcd42641c6feea3dee470f5f28a92b7b9407
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E23 4952 bytes
font_01_sfnt_off00005eec.bin
4cd8c75a8933bcdffd84d419fad715a5f3182b644ac8661a2762ff292c1ee898
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEC 9988 bytes
font_02_sfnt_off0000810b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x810B 4324 bytes