Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbbf646cfd646e6…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5076b8b63c8b7065715486d17a0ee72 SHA-1: b64e56c30392fb375e7b232ad580607c4b46f854 SHA-256: ebbbf646cfd646e637b4c439664c0429468589dbd13066ee3eaff7ef5ba3074c
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/wix?keyword=german+shepherd+rare+colors', is flagged as a malicious redirector. The presence of numerous links, including one to known malicious infrastructure, strongly suggests a malicious intent, likely for SEO manipulation or user redirection to harmful sites. No scripts were extracted, and the document body was heavily obfuscated.

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=german+shepherd+rare+colors
    • https://static.usrfiles.com/ugd/f523c3_fc088e4e317c4322a9324405208b8454.pdf
    • https://static.usrfiles.com/ugd/b8c837_91bf990c28404a6b84c79293ed3236f0.pdf
    • https://static.usrfiles.com/ugd/003b86_5725de37815a4c55943d0596b741f0f1.pdf
    • https://static.usrfiles.com/ugd/a91264_5018317517b8463caa505a5b9560f1ec.pdf
    • https://static.usrfiles.com/ugd/99afdc_e3d6302fe1454ced868e2a7285f129ee.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/99208896769.pdf
    • https://static.usrfiles.com/ugd/d4da64_c79102d84d224fb9b62c4c0c0fdfaf53.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_cf0427de31774139a37b7bd07f029ca1.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/76424405449.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8023/files/purevpn_vs_ipvanish.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_off00005f8f.bin
97baeb933433d879ba2741a0bdf5b498caebfb99a3d7b61f250250f8660e583d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8F 5344 bytes
font_01_sfnt_off00007182.bin
0254b43bc7036cab41e324b6515b36325ec03878b49cefd27641e2d5065be14d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 10108 bytes

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