Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7367bc74823c278…

MALICIOUS

PDF

48.7 KB Created: 2020-07-27 16:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024912fc28179eaae15697fdd6c0430e SHA-1: 4cf3bee9267edaecfe0b83ffe4226233a7364399 SHA-256: e7367bc74823c278f0c3aea8577f62af93c70b833ac48fa4f1ac5b031b9c08c8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized content for link farms. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=role+of+chloroform+in+plant+dna+extraction
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.nicholsbaptistchurch.com/uploads/1/3/0/8/130813645/semug.pdf
    • http://files.inspiring-tomorrows-leaders.com/uploads/1/3/1/4/131406780/243150.pdf
    • http://files.embracerefugeebirth.com/uploads/1/3/1/3/131380612/donis-suzabumirotole.pdf
    • https://cdn.shopify.com/s/files/1/0433/5055/6821/files/fategoviro.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/25532051810.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/votizepamesikegumu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/natoweborinesujaxofabasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/bivijagepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/gitiwavosekibavunokoforo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/57472715045.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/lavesobagezev.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/29870604779.pdf
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/safimubodujumapagitamov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/56986539633.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/81910786908.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/94100246320.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_off000080e3.bin
02ca9a73d383f69de72a4c68584f71a3abd5936c90ee7e21275c99d127154db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E3 5080 bytes
font_01_sfnt_off00009200.bin
e4aace5fb72604593bb48df196fd6fa3cd8fdd6165d394ccbda9562b187d0990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9200 10264 bytes

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