Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51469a2ecffd1f2…

MALICIOUS

PDF

69.0 KB Created: 2020-08-30 19:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 594dc5aaf343c959d1df2b900e00ad7c SHA-1: 5feaeb7d60e8faaee14de5af931a02ceb696f16f SHA-256: b51469a2ecffd1f2754f9e7d2ac4e74a96966f20eab3b457a1fdbe032df33ac6
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify. One critical heuristic identified a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests a likely attempt to lure users to malicious content through a chain of redirects.

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/wix?keyword=oxyacetylene+gas+welding+diagram
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/tnpsc_aptitude_questions_answers_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0450/0389/9048/files/bass_boosted_software_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/30467595947.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5153/files/cesur_ve_gzel_english_subtitles_episode_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://static.usrfiles.com/ugd/b8c837_651e5f6040ec418d9a75004962bd327c.pdf
    • https://static.usrfiles.com/ugd/91e123_820439d95c1f4d0786401bd8e52aa16f.pdf
    • https://static.usrfiles.com/ugd/7f16bd_c91c24660e9e4ec8b948aa386dd4899a.pdf
    • https://static.usrfiles.com/ugd/3e87bf_867c7b4590f1467da943c5b34d677ce1.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/10025671110.pdf
    • https://cdn.shopify.com/s/files/1/0457/8190/9660/files/96088906965.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/valmiki_ramayanam_ayodhya_kanda_in_telugu.pdf
    • https://static.usrfiles.com/ugd/b8c837_d45b111e88584da98dea72fcc6a5f0b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_13a468482e48450dbbfc3fc476ab9681.pdf
    • https://static.usrfiles.com/ugd/b8c837_c01d6638b6094a0299b3f2a9bd41b394.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca5af8255dab4f77b418bf4e95e8d011.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f540c36f1c48febaffc0d2ab13633a.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_off0000d11d.bin
e85b958109dc6048593d5d3f29d732fbe0a3260f800cb5c7cf29499b08b9326d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 5548 bytes
font_01_sfnt_off0000e3ff.bin
4f0bb977affc73ea6b1e89aacbfd8a82031de8da834114d2a3da1c2206cb759b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10208 bytes

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