Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f69efb25146213a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-18 13:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd9e48cf7cce238e4f31250e9b269519 SHA-1: 7ff73dc2ba5d2017a9fc09f67eea72f8924f168e SHA-256: 1f69efb25146213a4bdab3f1cd8bfa2166124c4aec2bcbe020977ca0a905d2ec
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains the target URL. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to click a link that leads to malicious infrastructure.

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=android+tv+remote+control+ipad
    • http://xudunimav.happydaycafe.ca/uploads/1/3/1/4/131453501/6bc0fa6ba.pdf
    • http://files.sunnylifemedia.com/uploads/1/3/1/8/131871786/b4120ee4.pdf
    • http://renigove.sigmadevtech.com/uploads/1/3/1/4/131453541/9c2e8233076079c.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/56123332019.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/wereritisonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/sources_of_nitrogen_dioxide_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/nurse_report_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/89277597400.pdf
    • https://cdn.shopify.com/s/files/1/0435/4716/4840/files/adblock_plus_full_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/retencion_placentaria_bovinos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/mufufeper.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_off00006619.bin
8c9de87a0c1b35c58d40ae321891380e8f6f869beaa37a4ee05bd18059574bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6619 5092 bytes
font_01_sfnt_off0000774e.bin
4962390111eb7fde1e8ee19003f7c180d75a848ee2eb6e8cec9f1a651ac2e4a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x774E 10544 bytes

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