Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e553681858ed19…

MALICIOUS

PDF

39.7 KB Created: 2020-08-30 08:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 299baeabef3f8b8729c6787520fe8695 SHA-1: 761c6e0bc901d660781e5cd267a515502c61d68d SHA-256: 26e553681858ed1996a65361c3b9864f61ff93bcabbe947ae82c294dca39e73b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, suggests a lure related to an exam answer key. The primary malicious URL identified is https://ttraff.com/wix?keyword=meb+de%25C4%259Ferlendirme+s%25C4%25B1nav%25C4%25B1+cevap+anahtar%25C4%25B1, which is likely used to redirect users to further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=meb+de%25C4%259Ferlendirme+s%25C4%25B1nav%25C4%25B1+cevap+anahtar%25C4%25B1
    • https://static.usrfiles.com/ugd/7e0eb0_6dbbfa06167b4b129b15fc6e9ba8bf22.pdf
    • https://static.usrfiles.com/ugd/2486b5_9afe217ced61492aba5e87de2b50ade7.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_40ce6c984834420a8aabc49d67540abd.pdf
    • https://static.usrfiles.com/ugd/b8c837_7512fdf9bc5245d49cfd1570251fa20f.pdf
    • https://static.usrfiles.com/ugd/b8c837_01d9be52db3f48eb85dce203f68a2ad5.pdf
    • https://static.usrfiles.com/ugd/1be480_6f3e47db58f54349b6fb085ae011bbcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_642773ac15ce4b6585d5d3bfa5f34a20.pdf
    • https://static.usrfiles.com/ugd/f1780b_90b8ee196bc3475a80e679a384304c90.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/59327307759.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/animal_camouflage_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/0409/9735/files/luriwevirijivalirozeduf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/carrera_kraken_mountain_bike_manual.pdf
    • https://static.usrfiles.com/ugd/9757e7_6d0bc6390c8e49228bde7eaac2f04797.pdf
    • https://static.usrfiles.com/ugd/a107db_d3073fbc259e40ffa044bf9e8a41842c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e551826a3394389b3bcb35e37064770.pdf
    • https://static.usrfiles.com/ugd/6d59ab_9dafa83c0de84202b82c97297efede21.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_cfb25da8006340b5b667e36321a61e7e.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_off00005734.bin
4de9cd07da08a5e0962bfe3aa4d2d22394b8cc856a7a3873d8257e8cf8e7a0e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5734 5780 bytes
font_01_sfnt_off00006ab9.bin
997f847697e43091fe9fab25196644d348d536e44e1e2a879d12849e385e6f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB9 11756 bytes

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