Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b835e665b683d3…

MALICIOUS

PDF

44.9 KB Created: 2020-08-29 15:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b039a52bde91e7d9e70feb7bfe8675f SHA-1: d020ac7c675943a750ea596bb9ab78fefea2e583 SHA-256: 26b835e665b683d396f456ff7e15abda4f0c961b1252a31f12484fb2c82e7485
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=old+ncert+biology+class+11th+pdf', which is flagged as a malicious redirector. This suggests the document's primary purpose is to trick users into visiting this malicious link, likely leading to further compromise.

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=old+ncert+biology+class+11th+pdf
    • https://static.usrfiles.com/ugd/b8c837_f85a0c8408f24b5a8176195d23d1c47f.pdf
    • https://static.usrfiles.com/ugd/704566_d5989c757feb407b87b0272c8a37c2f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_db409db4f6a241769f915350bc4ae4e7.pdf
    • https://static.usrfiles.com/ugd/a467d2_3eb291bffe134a29a8b3985aec2e6976.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e4b32c57ab241428c5361669087035c.pdf
    • https://static.usrfiles.com/ugd/b8c837_82c0bf740d0c4bbcad856d7bcbf0050f.pdf
    • https://static.usrfiles.com/ugd/136d07_9fdad5dee42e4b9d855364c93e70b955.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8a3b5f26b1c43e3b0c78f03e4a0e224.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/adhyatma_ramayanam_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/7289448911.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/niburosuwijaverofevo.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/40539099314.pdf
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/arunima_sinha_biography.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_off00006932.bin
803ce56d5ad4a744ab19eab3f008b96e8bbd1f311681473ef1f605f27d5b8b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 5736 bytes
font_01_sfnt_off00007cb3.bin
de68f582df94274650659e9c81e2d05bf6e16d652a2472e6a609181171d65fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 13268 bytes

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