Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b206d914787ee1…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 04:39:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab5ce950ffd36ac1e0100243f3b6a99d SHA-1: 348489afca36dd3549e8ed94ea68b4d0236eceb0 SHA-256: a9b206d914787ee1ebe5ceba5597882a7909004880f55717876bf546d997fd8e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=amar+chitra+katha+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting the document is designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=amar+chitra+katha+pdf
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/witcher_3_steam_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/wekisogopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/xabegovubemojudamajakili.pdf
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/92505096198.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccae4a17a7f04627bd4f1000765c3305.pdf
    • https://static.usrfiles.com/ugd/b8c837_99e0277005fb42d088b4fafd92db5424.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6f01d067cf54a63b6bc79927bb47493.pdf
    • https://static.usrfiles.com/ugd/865d50_75c7b6112f32466abbb32d8e2c202e02.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a694811ad564bd38b965194c57d12a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0548e9bc00a44e48fcb6ea0fc69947d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dc7f39e312144e18ce24ed2f66e7f4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e6c73a0db134c0095ad4887dd126290.pdf
    • https://static.usrfiles.com/ugd/3e9e83_173171a1e6164f108bb96cb117206805.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a9611631e2c47a1bae29aa0f52696d1.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_off000061ea.bin
82199937d6de39a4f6a59af3e82aa3e8b956b7ae96de1c18a0d1225bf3462c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EA 5236 bytes
font_01_sfnt_off0000738f.bin
8f2830ff6d20eea4d832d6285e2ae8971b70ce86973b1b9e1506ca906da61746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738F 10144 bytes

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