Malicious PDF — malware analysis report

Static analysis result for SHA-256 848e87616cd5488f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-12 07:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afcdfe3dfdb20952f366697a26d59904 SHA-1: eee71b5d3a03ce4b854a409ea7229a7e3251fda6 SHA-256: 848e87616cd5488fa02fdad2401861962ad9d951b605aa1097fd733ff7c60e8c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'ttraff.com'. The document body, though partially corrupted, contains the same URL, suggesting a lure to download a PDF. The presence of many external PDF links, including benign ones on Shopify, indicates a link farm strategy. The primary malicious URL is https://ttraff.com/pify?keyword=ejemplos+de+acta+constitutiva+de+una+empresa+pdf, which likely serves as a gateway to further malicious 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=ejemplos+de+acta+constitutiva+de+una+empresa+pdf
    • http://vutezeset.primrosehillevents.com/uploads/1/3/0/7/130775350/3515353.pdf
    • http://files.100crystalametz.com/uploads/1/3/1/8/131860378/wijuxukagado.pdf
    • http://files.lumibella.ca/uploads/1/3/0/7/130739916/e8e702e63a53930.pdf
    • http://files.rebeccalangston-george.com/uploads/1/3/1/3/131382595/669a7f9a86bc.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/biretuniv.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/43794473818.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/37500736576.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49221060197.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/96993289248.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/13100118738.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/neopets_faerie_quests.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/segulevida.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/verawolif.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/antibioticos_betalactamicos_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0935/files/84427694855.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_off000067c1.bin
ffaebe6a24a056f3bea1b13fb100eab80ecb9ed5014e0503357a037649f5760c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5392 bytes
font_01_sfnt_off00007a0e.bin
9755f197e1a8315f39828515e4c6dee1e6ffdb930b4a8f6bc55215d847b8d8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0E 11796 bytes

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