Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a4cb0768405eac…

MALICIOUS

PDF

102.6 KB Created: 2020-08-14 19:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7df62f8d00f0d15f7e99c0f2de18d38 SHA-1: 55efd81d0b1815b5650570ca89b0fccc21f64427 SHA-256: 31a4cb0768405eac64bbd6fecd9e376faccb4fc6437383fb1014846a56ce4432
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection chain. The ML_NYX_PDF_MALICIOUS flag further supports the malicious nature of the file. The primary attack pattern involves luring users through a deceptive document title to a malicious redirector.

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.ru/pify?keyword=abecedario+espa%25C3%25B1ol+pdf
    • http://files.thepowerhouseuk.com/uploads/1/3/1/3/131379830/eb5ae.pdf
    • http://fovoti.suepaton.net/uploads/1/3/0/9/130969042/f84f5d5170df9ae.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3629/files/dakuduxekef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/76509045860.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2628/files/xuvibokiposej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/xajixezise.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/92646959845.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/jolafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/rural_sociology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/60825281319.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/anexo_22_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/tipos_de_analogias_verbales.pdf
    • https://cdn.shopify.com/s/files/1/0429/3266/6524/files/xesazikasiti.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/munaripudopagilud.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/49699724598.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_off000149c6.bin
967ce1928a37b13f8d4197ecce91389931d3e204547f5c6a820c6b5b3a2de421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149C6 5492 bytes
font_01_sfnt_off00015c33.bin
864cbf691b8ea2ec3d03254d9b751d60987511d450658a4cf43def54ca32ef45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C33 14964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.