Malicious PDF — malware analysis report

Static analysis result for SHA-256 228d306d68e54875…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 04:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 644b68fc921171a012cec22a68966cca SHA-1: 7e0bf89d27d668e2b91868bddc589a617d35fbfb SHA-256: 228d306d68e5487570285bfb4e685a6ec152c9a135b5b29a02ec8dd90945d6c9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=time+complexity+of+recursion'. Additionally, a PDF link farm heuristic indicates the presence of numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0437/3164/8663/files/yanfly_message_core.pdf' being the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=time+complexity+of+recursion
    • http://files.mynewonline.store/uploads/1/3/0/8/130874322/tetavutizepefu-disogasufuz-bamafos.pdf
    • http://files.salinastowing.com/uploads/1/3/1/3/131384281/zowuburiso.pdf
    • http://files.touchofgracehealing.org/uploads/1/3/0/7/130775490/wisoj.pdf
    • http://files.sjvkailua.org/uploads/1/3/1/6/131606839/darupizetelaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3164/8663/files/yanfly_message_core.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/73827084053.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/punutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/87360529888.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/65019841711.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/95238058254.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/75883693774.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/69447861767.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/factorio_red_circuit_layout.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0469/files/66837020189.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/60647554848.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/1/0434/3431/1845/files/694478617

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006839.bin
7d371b9b5ebfe259c458debe787c80b12e6d7eaf6fb9f14765133c09d16faeb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 5068 bytes
font_01_sfnt_off0000797a.bin
7ddba33ef1a788321cfad479ae7264d321a3031f8b5f504f64f303ea02e062bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 10044 bytes

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