Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e078d8810754e64…

MALICIOUS

PDF

33.0 KB Created: 2020-08-25 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6be8a3eebbb337c02709ae33ad8fca1 SHA-1: 762e5b12a57528e94872e3ec670088daf903b9de SHA-256: 4e078d8810754e644c41097e30573aa64098e6df0cd227ce6fe984917d1d944e
150 Risk Score

Malware Insights

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

This PDF file contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=bose+soundbar+universal+remote+manual'. The document body, though heavily obfuscated, appears to contain references to this URL and other Shopify-hosted PDFs, suggesting a lure to a malicious site disguised as a manual. No scripts were extracted from this sample.

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=bose+soundbar+universal+remote+manual
    • http://files.goodstuffbyshalonne.com/uploads/1/3/0/9/130969408/9556525.pdf
    • http://files.bigbaldbeardos.com/uploads/1/3/0/9/130969054/sipilekefadidelif.pdf
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/download_buku_barzanji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/88270802086.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/suxutiwopojokenetefogoxud.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/88203981941.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/71037870018.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3409/files/45055189529.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/edamame_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/zavuxenaxesujipirokem.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_off000044ad.bin
32786aceba86ec3b71dbfd9d7b570f8f9c55c0b2feffe3791f4ee336e7ae86ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44AD 5220 bytes
font_01_sfnt_off00005651.bin
dc298e2be1dc2aac5a862483cf3a6eebf72a655899559964869f17b272fc89b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5651 9684 bytes

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