Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cad7741ef42743…

MALICIOUS

PDF

33.4 KB Created: 2020-08-19 15:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b22eee2d601c7d43e1914c9795c01fbd SHA-1: 1b1011e8a4bbdbd8460ae73f6d2f483ec4604ce7 SHA-256: d3cad7741ef42743e9b3b9f510df3fcb3aad1ec57ab6e861ef760104b74789a5
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used in SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to a harmful destination.

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=makita+plunge+saw+guide+rail+rubber
    • http://files.rjwaggoner.org/uploads/1/3/2/7/132712490/1833094.pdf
    • http://files.kwongwingkwan.com/uploads/1/3/0/9/130969704/nevugibugazojafuwav.pdf
    • http://buwakuj.anythingsweetandmorecafe.com/uploads/1/3/1/4/131437914/c172c.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/rekenavekezafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/62727304767.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/spatial_analysis_arcgis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/atlas_copco_air_compressor_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/79086252048.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/gumozerafalesukapuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/software_engineering_reporting_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/luwogonazifutepabawaluto.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/43189278788.pdf
    • https://cdn.shopify.com/s/files/1/0439/4346/1032/files/89787035695.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_off00004458.bin
3062a2e8db9e95881ce5105b778db303820b817b73f3315f32bd1f155885731a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4458 5428 bytes
font_01_sfnt_off000056e1.bin
9265ac4b28fc0b7ab50e402c0c3070c33db3319a37ca1ad1226e07c0d8b2dfe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 9912 bytes

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