Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76f31a7b69701f4…

MALICIOUS

PDF

53.8 KB Created: 2020-08-13 22:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86e27def880a1e8c8e28c2ef1e513ead SHA-1: d90570395b31b470ba4ff9378d51d532e43bffc2 SHA-256: f76f31a7b69701f491903c655256011847e0e4cdc1988a5bd4fbeaf207f9f40f
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as an Ofsted report. The document also hosts a large number of external PDF links, many of which are benign but likely serve to obscure the malicious link. The primary malicious URL is https://ttraff.cc/pify?keyword=cove+school+ofsted+report, which is designed to redirect users to further malicious content.

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=cove+school+ofsted+report
    • http://files.bluegrassbabyexpo.com/uploads/1/3/1/6/131606861/gejajunok.pdf
    • http://files.tarotartist.net/uploads/1/3/2/6/132681938/8280551.pdf
    • http://files.littlequiltcreations.com/uploads/1/3/1/1/131164236/gugudatutasuke.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/72511928618.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/biology_101_exam.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2707/files/tomikikiner.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/48431806113.pdf
    • https://cdn.shopify.com/s/files/1/0430/3824/5017/files/anatomy_and_physiology_book_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/jajozerivujiveketotiwij.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/chemical_properties_of_aldehydes_and_ketones.pdf
    • https://cdn.shopify.com/s/files/1/0448/1361/5264/files/business_intelligence_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/24623272272.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3396/files/detez.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/ccie_wireless_syllabus.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651c.bin
6b73578daef1490c1b2929d0444a811a164443739a69df5ca7509217de3ce98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 3212 bytes
font_01_sfnt_off0000709a.bin
ed1de8a52dbc5efd01480cccfe39f82588be8e5c00b144ed6fe6dddd8544a3a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709A 5000 bytes
font_02_sfnt_off00008194.bin
2d35be22421bcbcdb441116a3d74e6d53f87bfc42d276c05642d8834e2a0ad3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 4048 bytes
font_03_sfnt_off00008fb6.bin
3cf2c675b81c8869654d95172517c446241dd8e803b4785798735b666f1cdb5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB6 10632 bytes
font_04_sfnt_off0000b455.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB455 16164 bytes

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