Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bc76d3f942d9cf…

MALICIOUS

PDF

43.5 KB Created: 2020-08-13 22:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82bacf8ff8c75416394ef4c64c91a9e7 SHA-1: fe7822e699b9dea933bfc75d4dd7711563c77896 SHA-256: c0bc76d3f942d9cf2afc8b7898a42e666ef57f6a68de1767a8a19bf858bafd53
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented to the user with a lure for 'Torch browser windows 7 free'. The PDF also contains a link farm heuristic, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to improve search engine ranking for malicious lures. The primary malicious URL is the redirector.

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=torch+browser+windows+7+free
    • http://zokulado.dwayneblackaller.com/uploads/1/3/1/3/131384284/nafojunebovak-jepovedanav-pugagidupunaf.pdf
    • http://files.david-reinhard.com/uploads/1/3/1/4/131438639/vavorawesixeku.pdf
    • http://niroxo.adultgleeclubaustralia.com/uploads/1/3/2/8/132814930/rudadelam.pdf
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/megugevaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7057/files/zotasodunijubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/english_textbook_8th_class.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/35843598428.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/fap_titans_reborn.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0598/files/84012629545.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/90909785334.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9351/files/naruto_season_9.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/rivibuvaleroru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/lipigis.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_off00006086.bin
d288d1a09af5e3466874aeedff8fee6b877af963a678c09e27de81fc19121bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 4836 bytes
font_01_sfnt_off000070f7.bin
2f3a130501c7db81d77927c591c7a9bb0166827e3b3fa9eb53f79c2e682ae8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F7 10020 bytes
font_02_sfnt_off00009353.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9353 4324 bytes

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