Malicious PDF — malware analysis report

Static analysis result for SHA-256 1caacb8d52db3745…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 22:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d5c23c7d2eefcc297ad38d0864b3a9e SHA-1: e90df4709c3d74b338866b3e200b45d07f27ab39 SHA-256: 1caacb8d52db37454d73df8973073402b57803486cec8db53c4e6ce3a5449880
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=duels+mobile+game+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Duels mobile game guide' and the malicious URL, suggesting a lure to a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse.

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.cc/pify?keyword=duels+mobile+game+guide
    • http://files.littleflowerfloraldesign.com/uploads/1/3/0/7/130738919/wikelarosap_timipojufes_zurugonokorola.pdf
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/bayesian_statistics_an_introduction_peter_m_lee.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5271/files/1997_seadoo_gtx.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1473/files/drip_irrigation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4731/3827/files/asme_boiler_water_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/9398248716.pdf
    • https://cdn.shopify.com/s/files/1/0438/4030/7362/files/sigma_aldrich_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7184/8100/files/19849630833.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/sesol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texigusowemojegovivek.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/92051546821.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/dudusevenojujinej.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_off00006254.bin
6eec86dd037ff830e6b989981ea066ed73df69da619559a9e4b78be535727d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 5188 bytes
font_01_sfnt_off000073ea.bin
994e9e3d9808e6e77f3c9d18151f4d273f6d1fce3ea07756bcc7f132b3e3f4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 10316 bytes

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