Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f815a8b9b66049…

MALICIOUS

PDF

53.6 KB Created: 2020-08-20 19:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a7ab1a908bc54f194a974c88aef2867 SHA-1: bd410dae9d27c5b16cbd8267ae1bf19ca71141ee SHA-256: 93f815a8b9b660490687ad56a443916a0d86476a30874e68cbfac55fbe1b6914
150 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a search result for a 'solucionario castellan 3 edicion pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The embedded URL leads to a known malicious redirector, likely intended to deliver a secondary payload or phish for credentials.

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=solucionario+castellan+3+edicion+pdf
    • http://maxoxafir.olivetreemessianic.org/uploads/1/3/0/7/130775503/likurexupusuxuga.pdf
    • http://fikadanur.tnhb-inspirations.com/uploads/1/3/1/0/131070147/binivenodipajiwivux.pdf
    • http://files.calallenfootball.com/uploads/1/3/0/7/130739093/e7f2a4927176f98.pdf
    • http://fuvabuwif.cruisenvacationdeals.com/uploads/1/3/2/6/132695550/nadixupeb-wakogidiweroz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/strength_training_anatomy_2nd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4132/5207/files/mahindra_tractor_parts_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/ledag.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/71585089667.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/momozupuzuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/sonda_vesical_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/3916/1500/files/prueba_de_coombs_directa_fundamento.pdf
    • https://cdn.shopify.com/s/files/1/0439/2452/1128/files/92677465605.pdf
    • https://cdn.shopify.com/s/files/1/0429/9223/8745/files/miller_syncrowave_250_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/dodewidimiwexizikime.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/1/0430/9689/9733/files/stre

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ae6.bin
776c011e58134ee0514b2782997a9106c41533477990e32687ba3949797e85b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE6 5416 bytes
font_01_sfnt_off00009d52.bin
0c9b2be417e099530a696c96c68fe795e7c0ce7d87fe783e5aa8c8c5454c84f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D52 14004 bytes

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