Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b1d926f72d5f65…

MALICIOUS

PDF

44.0 KB Created: 2020-08-27 19:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 887242c6448a333acbae0155a3230d8d SHA-1: f83ead5c2fa7e70ba84fc0993e1d2e7f47891ebf SHA-256: d9b1d926f72d5f65031d81afd32036b591dd2143ff1798140a835a3cc7aa35be
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One of these links, 'https://ttraff.link/pify?keyword=calvin+tisser+p%25C3%25A5+duke', is flagged as a malicious redirector. The presence of a large number of links, including those hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or to distribute malicious content through a seemingly benign platform. No scripts were extracted, and the document body was heavily obfuscated.

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/pify?keyword=calvin+tisser+p%25C3%25A5+duke
    • http://files.bamboogrove.net.au/uploads/1/3/1/4/131412235/zazojagowetuju_mixaxer_lojanaladazor.pdf
    • http://buduposur.maynardcattleco.com.au/uploads/1/3/1/4/131453723/pameru.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/gefejitejako.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/gafebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/5005907618.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/phonetic_transcription.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/13193841333.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/entourage_season_1_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/buddynice_album_zip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/buffers_in_the_body.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/14367985882.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/1015424572.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/58655278731.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_off000069c8.bin
f3df2ece36f69556d2983f455f176eabed99e7ab8ee0845f9e630d1046beb6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C8 5288 bytes
font_01_sfnt_off00007b3d.bin
98b3458b52ab45e49db4ccc5d3cbe9147f678b993162dec3df4527e5f482fcc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3D 11720 bytes

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