Malicious PDF — malware analysis report

Static analysis result for SHA-256 4049977ffb5fc61f…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 17:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2aafabe920ccf3a0fca58e3d5fff61a SHA-1: 1a75b048a252c4695ec045c36234bfd63bb81297 SHA-256: 4049977ffb5fc61f060e130d7a676ff65a076a03e35ae7758346a4b439357c08
128 Risk Score

Malware Insights

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

The PDF contains text that mimics financial statement practice questions, a common lure for phishing. It embeds a link to 'ttraff.com', identified as a malicious redirector. The document also contains a mass of external PDF links, many hosted on Shopify, which is indicative of a link farm designed to improve SEO for malicious content. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=income+statement+and+balance+sheet+practice+questions
    • http://files.auroracbdhemp.com/uploads/1/3/1/1/131164063/8810406.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/8782434951.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/laxexiwanusosanogufux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/hallelujah_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/51796023778.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/dumagofurumebepofifasobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/91762156429.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/numerical_methods_for_engineers.pdf
    • https://cdn.shopify.com/s/files/1/0436/8308/6489/files/pixobiwavif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/39974188291.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/redomesilesilorazer.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/62206591602.pdf
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/97061666192.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/17487372809.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_off000064cb.bin
b4a015d9eb13dfcb54a2cc564143fb0381e0621ba4115db49e2bbebde525f076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 5516 bytes
font_01_sfnt_off0000773d.bin
ef5e78431043a8d1088ed59a33173d1b5964a3bbe44d7f615785d1fcb001c990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 10876 bytes

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