Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fde271933457e6…

MALICIOUS

PDF

46.4 KB Created: 2020-07-30 21:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a496ccdccd90586033953de62b9acda SHA-1: 249ab6659ef1272cf473210305a25370cd6ad7d7 SHA-256: 63fde271933457e6d5baa3275236372bb8329cd3007f140a0d086cf252a8fc72
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.ru/pify?keyword=jk+bank+banking+associate+syllabus+pdf+download', is flagged as malicious. This indicates the document is likely part of a phishing or malware distribution campaign, using a link farm to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=jk+bank+banking+associate+syllabus+pdf+download
    • http://files.delcacao.ch/uploads/1/3/0/7/130739532/6216363.pdf
    • http://files.elrodeonews.com/uploads/1/3/0/9/130969459/kedujowerepes.pdf
    • http://files.brandedshow.com/uploads/1/3/1/3/131379709/webodaro.pdf
    • http://files.vanaudelanalytix.com/uploads/1/3/0/8/130874587/filebaniremi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/rafibulewedewulod.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/vanewanosubibatawupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/83097575609.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/90051064147.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/vabusubavapuvusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/jedotamodixixujowuxefov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/xaxoxewadoxaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/28010157498.pdf
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/75964345533.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/lobupepamofugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/31367565095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/nozabojibezilulire.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076ce.bin
db785da3e3b5485eeb4f4a4b214f0bbf2ccff29d30b9e4b9baac20cf23b97224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CE 5496 bytes
font_01_sfnt_off000089a7.bin
920761aed8019c60521d00e80985fa8715b1c30b91984a99c99ab65ea2042dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 10196 bytes

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