Malicious PDF — malware analysis report

Static analysis result for SHA-256 276b0e036220f9a5…

MALICIOUS

PDF

33.4 KB Created: 2020-08-19 04:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03eaace6d1abee83bf0898b07959fc54 SHA-1: fb7afbc532265186e7a3b7f37ab91cdd964a42d0 SHA-256: 276b0e036220f9a50c7b2cf1e85fa579b0c1fa68ecc11e085d466956250ed8de
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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.com/pify?keyword=gracie%2527+s+theme+free+sheet+music+pdf
    • http://puguxiwu.thecactusroom.org/uploads/1/3/0/7/130739963/04ee7c5901da8a.pdf
    • http://mesag.cartravelsafety.com/uploads/1/3/1/8/131871740/29aeb3e7058d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5722/5638/files/dazed_and_confused_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdf
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/52336901905.pdf
    • https://cdn.shopify.com/s/files/1/0439/5309/4811/files/fitotimilimedejuleseveden.pdf
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/16176839413.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/9286452971.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/wuwesabijumodegodanasirij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/davijefuposinezirupisiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/zopemajikodevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/dezloader_4._3_con_spotifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6006/files/lowrance_hds_9_gen_2.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_off0000450f.bin
131204aefb3c690f1ae1f27ac9f3a920a039e854d883634729ddd35d96257f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x450F 5428 bytes
font_01_sfnt_off00005766.bin
f6ebdba7b2abfbb2423e05521af9a9e59cb6248223e63dacc298ceb0504bb448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5766 9856 bytes

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