Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9368075681a516…

MALICIOUS

PDF

35.4 KB Created: 2020-08-19 18:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7555f50881677e472495000170eb15e6 SHA-1: 5f71f33782b8d551c8f4915e70404f7607ba0283 SHA-256: cb9368075681a5165ccd8c0d2fb744af5cc3013968bcd08ef520596422d40737
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'quotations marks worksheet middle school' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, which are likely used to obscure the primary malicious destination.

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.ru/pify?keyword=quotations+marks+worksheet+middle+school
    • http://files.southeasternpaleoamerican.org/uploads/1/3/2/6/132696113/7237e3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4923/0237/files/22625504589.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/wapope.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/jolazojegolake.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/8938729515.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/wiwilaxezepabugul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depusulolunifanilux.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/watch_sankat_mochan_mahabali_hanumaan.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/69279704583.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/39374620541.pdf
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/osrs_the_forsaken_tower_quick_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5098/files/kuxije.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_off00004cc8.bin
563dae84c8a232f890ee0654d0ab7bedabf068f033d4ca788d9387c8d6ecd4a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC8 5396 bytes
font_01_sfnt_off00005f05.bin
101a33688b53d3a7f949e27bf00e57601d6e3eacb6aee09d87b9147b210fa88f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F05 10072 bytes

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