Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71b827384b3c318…

MALICIOUS

PDF

48.1 KB Created: 2020-08-08 23:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e5115c7c7a4cf4bb7cbf41818c3ca9c SHA-1: 7dae7496e03a55380d33baa8853802114545bb26 SHA-256: b71b827384b3c318d54aa85a3d02bd1b962867aa7cdb40ce483ec12431a50db6
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=alcor%25C3%25A3o+comentado+pdf. This suggests the document is designed to lure users into clicking through a chain of links, ultimately leading to a malicious site. No scripts were extracted from this sample.

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=alcor%25C3%25A3o+comentado+pdf
    • http://files.learningandwriting.com/uploads/1/3/2/8/132814050/xepopikusewajijin.pdf
    • http://files.pianomanlarryhunt.com/uploads/1/3/1/6/131606670/dopofe-pusumixuwoje-xekakefowi-xisevenizajare.pdf
    • http://files.pgfintegrations.com/uploads/1/3/2/6/132682640/af1d5d8a914e63.pdf
    • http://files.purplepandaglitter.com/uploads/1/3/1/1/131163976/5490222.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/94417191106.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/58731797559.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/94377596149.pdf
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/intel_graphic_media_accelerator_950.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/61663217382.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/96468566137.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/popujokewivelugugev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0617/3081/files/argala_stotram_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/62256359152.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/watch_naruto_shippuden_476.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/suvejolobokipafato.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/93708664581.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_off00007a8c.bin
1dedf2702cb2bcfd86aacc59cae80984c3a9bf1899956d59c55529bbcb247fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 5428 bytes
font_01_sfnt_off00008c5c.bin
4687e89ae651563097291f85437596a916df2ad9d4abf2fca589c56261d0a415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5C 12452 bytes

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