Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54c0cb9e9df95c8…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 22:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 425a950fcf10933f71b34f264c296d22 SHA-1: 4cb4f7ecf0c6ad923b12980fecc4e04865efc05a SHA-256: d54c0cb9e9df95c8aad54aaa82a3952672df7e50cdfd858b2be91c8cde29ffff
120 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for "11th chemistry notes pdf free". The primary malicious link, https://ttraff.com/pify?keyword=11th+chemistry+notes+pdf+free, is likely intended to redirect the user 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.com/pify?keyword=11th+chemistry+notes+pdf+free
    • http://files.leguesepticservices.com/uploads/1/3/1/6/131606789/651974.pdf
    • http://gejas.mykitchenkitchen.com/uploads/1/3/2/8/132814930/wakewi.pdf
    • http://zumit.cyclingforsight.org/uploads/1/3/1/6/131606027/0a995bfb.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/noduvuxima.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/41737105804.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/nekimuzajuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/bovegapobugijuxexuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/pelepetividupivew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/18106098354.pdf
    • https://cdn.shopify.com/s/files/1/0435/3005/9927/files/43330693799.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/kuvilanewajadunuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/sinhala_baby_girl_names_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/dunaridu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/jiworidojudowuxenesegizov.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/71323434755.pdf
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/42960186002.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/65356167522.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/rutikojubujed.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_off00006d91.bin
551304cbd93e355e4d0e5242097e9b2254f86d52bb789d442eee220a23d18767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 5212 bytes
font_01_sfnt_off00007f29.bin
d0458d71d208b6aa20461528e551a6fcd4ee08c537c5b128c6e4d5a2c9244aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F29 9928 bytes

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