Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e60c0a4281d55be…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 18:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e454f65187820af490728f044e0df04 SHA-1: efde28309f5b8aaf40a915a4912f5d0da621be7c SHA-256: 9e60c0a4281d55be81f2bfdada0a1ea79fbfc908b1f8e573b9369e0a98fda8b9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=types+of+membrane+transport+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, including one hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL and a benign-looking title, suggesting a lure to disguise the malicious intent.

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=types+of+membrane+transport+worksheet
    • http://tamapulul.hemstreetllamas.com/uploads/1/3/1/6/131636725/volovikupuvefa_gewusu_zunonaxo_lelarekojurep.pdf
    • http://files.lakefieldvisioncare.com/uploads/1/3/0/7/130775998/2113080.pdf
    • http://files.experiencemoretolife.com/uploads/1/3/2/6/132680808/6784098.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/xixoxapuridaxij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/57469748576.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/belarigiwojigekesopuxatog.pdf
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/78195603161.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/wusex.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/carousel_brainstorming_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0435/3828/4699/files/18232820941.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/37973207536.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/65329703820.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_off000061fc.bin
2898076c23ada53254e19d3e6a4ed121e98bcb47f365e96b8aa51f8a7402b343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 5456 bytes
font_01_sfnt_off00007474.bin
15f29cb2abcd14d735ae4f5e11cc9787cedc0ff57400bf8908478d6cf1b4ec70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7474 10132 bytes

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