Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53b818effd11ee8…

MALICIOUS

PDF

38.0 KB Created: 2020-07-30 04:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89ab3051490cabbe569837cbe27203a3 SHA-1: f80c91893d63b907eec299b02c6774e4fd10811e SHA-256: c53b818effd11ee81aff8d0b716ff509229ee6acf9a000fc884e356941d5cb59
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying a 'PDF_MALICIOUS_REDIRECTOR_LINK' pointing to 'ttraff.com'. Another heuristic, 'PDF_SEO_LINK_FARM', indicates a large number of external PDF links, suggesting a tactic to manipulate search engine results or distribute malicious content. The document body itself is heavily obfuscated and does not provide clear textual clues about its intent.

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.com/pify?keyword=da%25C4%259Farc%25C4%25B1k+arap%25C3%25A7a+t%25C3%25BCrk%25C3%25A7e+s%25C3%25B6zl%25C3%25BCk+pdf
    • http://files.teaching-entrepreneurship.com/uploads/1/3/2/8/132815181/7138510.pdf
    • http://files.norstarindustries.ca/uploads/1/3/2/7/132710565/6924308.pdf
    • http://files.stellarcarevacations.com/uploads/1/3/2/7/132741109/5032976.pdf
    • http://files.joel-nichols.com/uploads/1/3/1/3/131379844/8746961.pdf
    • http://files.lindaozromano.com/uploads/1/3/1/4/131406811/8581719.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/mivagavibafajuxaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7087/2995/files/88011235010.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/24196923656.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/83016437887.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/wakiniwitanivaxosedojujuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/53570118876.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/74462240974.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/4992909758.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/67931993850.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/suniguwi.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_off000054c1.bin
352025d0bb805c38886a87a630afad8f889ab0383673a0335a6c49316ca365d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C1 5488 bytes
font_01_sfnt_off00006748.bin
3559d9a873034bf1d1c36388075e28293ea5a8bccfef283baecb9b5b95cdc477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 10468 bytes

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