Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05bde3de05df886…

MALICIOUS

PDF

74.0 KB Created: 2020-08-30 07:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa9c1138ffbad0e43af553e93cc1645 SHA-1: 010bab53068432f81b828ad76b8ee656ee93a5b8 SHA-256: c05bde3de05df8862ae7d335a979a87d819d73f290fbbdd8efcc97631dd5d5f0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO manipulation or to obscure malicious content. One of these links, 'https://ttraff.cc/wix?keyword=neonatal+and+pediatric+respiratory+c', is identified as a known malicious redirector. The document body itself is heavily obfuscated and appears to be generated content, further supporting the malicious intent of directing users to external, potentially harmful, resources.

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=neonatal+and+pediatric+respiratory+c
    • https://static.usrfiles.com/ugd/b8c837_9e3b4622226e425fbc95cc7d4cf7127b.pdf
    • https://static.usrfiles.com/ugd/18f527_9bb2c8b2083548d4b6ef5efb63d7f4df.pdf
    • https://static.usrfiles.com/ugd/b8c837_5275b60d53e04940a0f0ca0851ebc307.pdf
    • https://static.usrfiles.com/ugd/b8c837_14123bb2b7df4f5b8bded97bc6a65de2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5c930cd192341068dc5cb433cd6616b.pdf
    • https://static.usrfiles.com/ugd/33c377_823ac7b8bd5046228cf701189a360fb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4abf592978054b1da6bc63980d4e3767.pdf
    • https://static.usrfiles.com/ugd/b8c837_e73045bc16334da59d27fee98e5428c8.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/tibujadosejibevoxijedeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/kajaxevas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/complicated_intra_abdominal_infection_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2305/files/fibawitifetigij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/wetuxax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d306.bin
2bf54a1cb7fe4dd214b26af842305dbd08f2b7844a9c30438b381973d233431d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 4928 bytes
font_01_sfnt_off0000e3d3.bin
254b7d3522384c67002b53eb540101f533986110fb57da6d83a602305d071bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 12552 bytes
font_02_sfnt_off00010c7e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 4324 bytes

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