Malicious PDF — malware analysis report

Static analysis result for SHA-256 3faf4d1d8c14f9a3…

MALICIOUS

PDF

37.0 KB Created: 2020-08-25 12:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad837ef644c4953a183a09e912b9204f SHA-1: 442356c309fead7b37f0faecf1f0a052c94cd6b9 SHA-256: 3faf4d1d8c14f9a3c3ff371b7992c5a184096a4132c2ad0f3b8a5896670fb291
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL, https://ttraff.com/pify?keyword=hedwig%2527+s+theme+sheet+music+violin+printable, is a known redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure related to sheet music. The presence of numerous external links, many pointing to Shopify domains but ultimately leading to potentially malicious content, indicates a coordinated effort to distribute harmful content.

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.com/pify?keyword=hedwig%2527+s+theme+sheet+music+violin+printable
    • http://files.norawickman.com/uploads/1/3/2/6/132695258/1335355.pdf
    • http://files.rooambieretreat.com/uploads/1/3/1/3/131379991/1bff14ccc1.pdf
    • http://bavexaf.comfortrvmattresses.com/uploads/1/3/1/6/131637254/fisora.pdf
    • http://files.richardlewis.co.za/uploads/1/3/0/8/130813461/b22c5b4cfd4.pdf
    • http://rilosuli.wilkersonhomesinc.com/uploads/1/3/1/8/131858661/xasegeleje.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/89544837339.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/13047185613.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/xakuxor.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/convertir_de_a_word_editable_en_linea.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/bibuduloxibubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/36201177120.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/1614025870.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/55657461109.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/jaxatitig.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_off0000515c.bin
53b760b8c74b6c72fa59ebbc5d842c071bcac24c12164aa6d582c97e867e4aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x515C 5776 bytes
font_01_sfnt_off000064eb.bin
0729184750f7679ca5295aee199b141aea7dcde93f58376cf445b965b0ef5c18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 9908 bytes

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