Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03b06de32dcf9cc…

MALICIOUS

PDF

40.7 KB Created: 2020-09-18 01:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dd112d51f07e2953822387085710504 SHA-1: 92b0efcf279509b30e47d6e100803a0f98d26479 SHA-256: e03b06de32dcf9cc9cb7c04951c1712b904f5abd1e43f1bef2b57e2bed655fee
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.link/wix?keyword=comparing+decimals+percents+and+fractions+worksheets'. Additionally, the file exhibits characteristics of a PDF link farm, with numerous embedded links, one of which is 'http://fawitingartwork.com/uploads/1/3/1/3/131378960/xavifuxiji.pdf'. The document body, though heavily obfuscated, appears to contain text related to educational worksheets and the wkhtmltopdf tool, suggesting a lure to disguise malicious intent.

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.link/wix?keyword=comparing+decimals+percents+and+fractions+worksheets
    • http://fawiw.whitingartwork.com/uploads/1/3/1/3/131378960/xavifuxiji.pdf
    • https://6d51f974-8437-48aa-bea7-56ea14d7aded.filesusr.com/ugd/7a359d_10ae31e969d44236b1c78946cc73315a.pdf?index=true
    • https://6011fd22-15c4-41df-b61c-fd9c58e5566b.filesusr.com/ugd/95bb70_3dde24c5b32242b38a220c0b6ea8c41d.pdf?index=true
    • https://dc7bd685-00da-4517-bada-e23879702987.filesusr.com/ugd/81d6a4_cb0e8590934546429c409bd8cfef5c6d.pdf?index=true
    • https://a76b3c7d-be4f-47fc-8c9d-80002b1aeb78.filesusr.com/ugd/d99ef3_20d3d522c1fc4b519663d71342db3fa4.pdf?index=true
    • https://57355cc5-bea6-4b20-b18c-8aaa7825df96.filesusr.com/ugd/4ae4db_cd3767feec1b4af28aaf1537da7edc00.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/5431/6197/files/93508791673.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2423/files/34612278251.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/sigma_notation_properties_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/xebokeditegepib.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/psp_dating_sim.pdf
    • https://cdn.shopify.com/s/files/1/0432/7964/6878/files/89457100074.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/address_to_send_attendance_allowance_claim_form.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_off00005f45.bin
30df22f44b8b25cebe3e197f7355708fceffea3406b9550e8a8f2ee326156c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 5632 bytes
font_01_sfnt_off00007251.bin
3221e28fb9df000cc1f19038ca724111e5b010118f931ba97dde680fd4f2a743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7251 10440 bytes

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