Malicious PDF — malware analysis report

Static analysis result for SHA-256 3364e4fb6f4aa1b8…

MALICIOUS

PDF

46.7 KB Created: 2020-08-12 00:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78bffe0cbaaa0ba7f61127d265fc83a0 SHA-1: bd9d23d3294a2e47175e2b9fdf6c28baf30d31eb SHA-256: 3364e4fb6f4aa1b814ad2786e1990448c405bd1829b9b4f4da04a16aa9159eff
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially corrupted, includes the phrase "spelling bee activities pdf" and the malicious URL, indicating a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.cc/pify?keyword=spelling+bee+activities+pdf, which is likely used to redirect users to a further 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.cc/pify?keyword=spelling+bee+activities+pdf
    • http://files.sportmshenservice.com/uploads/1/3/0/7/130739227/vunipifilenum.pdf
    • http://files.dickenspickins.com/uploads/1/3/0/7/130775649/3b03672c83a5.pdf
    • http://files.normansignsanddesigns.com/uploads/1/3/0/7/130775557/zenozug_xurulaxibuwez.pdf
    • http://wuwateka.dundeeareahistory.com/uploads/1/3/1/3/131398008/faxuzokapumibes_kekoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/ruzefus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/74596632096.pdf
    • https://cdn.shopify.com/s/files/1/0433/1615/0427/files/85220257611.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/13824426102.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/94164033200.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/17375443580.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/zoxabiduzilewexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/nejafototisapufes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/sapigut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/bevaxevite.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/13275879127.pdf
    • https://cdn.shopify.com/s/files/1/0444/2364/3303/files/69242812350.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_off000077f1.bin
dc47b79e00738202ff2c21360c79a19f0cd2ba071e3c54ea67d435ee32696369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F1 5532 bytes
font_01_sfnt_off00008ad7.bin
61a7eb1eb0eeabb7fa9bf6b10ec3a455406e0aba7d085c2c64ef460c5d089e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD7 10276 bytes

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