Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c48b43494f12ce5…

MALICIOUS

PDF

37.8 KB Created: 2020-09-20 05:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 781700ba77904f46f5f72e09b3886e76 SHA-1: ad2391220c47cf0654455af6c4ac9dad350e06db SHA-256: 3c48b43494f12ce5d4a87bd789aa20d988ea3a4e8999fb6e58d92025c68b35d2
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains a string that appears to be a URL related to 'multi-step equations coloring worksheet pdf', which aligns with the malicious redirector's query parameter. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to obscure the malicious destination. The primary malicious IOC is the redirector URL.

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.me/wix?keyword=multi-step+equations+coloring+worksheet+pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/avoir_etre_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/electric_guitar_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/58216847288.pdf
    • https://1e654732-3e14-4b1c-b875-0cb0ec8acccd.filesusr.com/ugd/c0518c_4b6afdbf4fc7414085e1e88cbfff8f3c.pdf?index=true
    • https://3bbadb02-0c53-4fe9-8bcd-a675c04ba983.filesusr.com/ugd/724bd4_45f1e0a4005341b794114c44bc093dfd.pdf?index=true
    • https://c765d804-8be3-4952-99a2-671af869ec1c.filesusr.com/ugd/d2cc1f_79640230719f475abc1934269551a5db.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0466/2552/1829/files/34559087731.pdf
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/coordinates_system.pdf
    • https://b946b040-3972-449d-8156-e21c3750dfea.filesusr.com/ugd/784815_fd804d5fc79c48f985211c0901bf5dfb.pdf?index=true
    • https://c54506ef-84c7-4c3a-8272-e83a95c2a89c.filesusr.com/ugd/1cc7e8_7356376137274aa48aaffd9d0838d5ab.pdf?index=true
    • https://124a30b3-2c87-418d-8511-aff252f0173d.filesusr.com/ugd/9cc572_8eb2a7d9f1ba49d8859917caa238e472.pdf?index=true
    • https://e69129d0-b2ce-4036-80df-40729e4a5e05.filesusr.com/ugd/0d089b_c41aa4d242dc4a0eb4c0454c5cfd626f.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004640.bin
3bd9798699fb6e613794665c95ded79a0058fda0bf3569c8c0b0831ab18aa2f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4640 5616 bytes
font_01_sfnt_off00005966.bin
13fe2f07d7a26b6be5be684d51065b9cd811f6635d603687fab5cb039dc1c070
pdf-font-stream PDF embedded font (sfnt) at offset 0x5966 10192 bytes
font_02_sfnt_off00007c36.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C36 4324 bytes