Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1b14e163993b1d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-10 11:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aac3b58f2dc04d16947b7154d935dec6 SHA-1: 938d6b1021e20552e3583cff2e06a53257b31697 SHA-256: 4e1b14e163993b1dfdfb684165eb67d0a012ac53406e07a8e7d524d20a6ebe18
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as 'https://ttraff.cc/pify?keyword=insects+characteristics+pdf'. This URL is likely used to direct users to a phishing or malware download site. The document body, though heavily obfuscated, contains references to the redirector URL and a benign-looking Shopify URL, suggesting a lure to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=insects+characteristics+pdf
    • http://files.stokerhounds.co.uk/uploads/1/3/0/7/130739601/1a45dcce6aca3.pdf
    • http://files.serendipityondurham.com/uploads/1/3/1/8/131872104/tirorijo.pdf
    • http://files.thetrick.fr/uploads/1/3/2/8/132815342/poniliku-vodinovavuluja-wewevu-sidelugeseba.pdf
    • http://files.lindamitchellbooks.com/uploads/1/3/0/7/130776120/95883.pdf
    • http://files.lifeconsulting.co.nz/uploads/1/3/0/9/130969837/7d9639745c2921.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/oar_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/58408808809.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/xilaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5408/files/46591773362.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/38473580813.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/68412647841.pdf
    • https://cdn.shopify.com/s/files/1/0433/0189/6347/files/jusejabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/bloxorz_level_33.pdf
    • https://cdn.shopify.com/s/files/1/0435/8412/7135/files/nazujabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/29410486567.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/suxurufulebeke.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bfd.bin
1c29674b114597b4cd981f70a47371c0ef04bf30b65a7295d1ade38f217bedfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFD 5148 bytes
font_01_sfnt_off00007d7b.bin
c3764121237aec5a9a32553000229e62f14baa90908d0b1df25e8a25ea9d9cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7B 9972 bytes

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