Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f082d264ee4f07…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 18:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5840ba56784a92ef802f4adc5800ce8 SHA-1: 381fae6a2d5854973237da3502968b01d035ef17 SHA-256: b8f082d264ee4f070cb47c143267c40a782b21184e9a01f01549bc9ec1e66b26
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. This is further supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The document body text and the embedded URL suggest a lure for downloading content, which is a common social engineering tactic. The ML_NYX_PDF_MALICIOUS heuristic indicates a high probability of malicious intent.

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/wix?keyword=jai+hanuman+gyan+gun+sagar+mp3+download
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/32158454145.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/kimulivasij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4369/2445/files/73238178083.pdf
    • https://static.usrfiles.com/ugd/b8c837_57315f2387064f5b9116b351a20719dc.pdf
    • https://static.usrfiles.com/ugd/0f5b72_0b899f5d5b8c47bf9aa52f49e1e66938.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/doduxitokifena.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/limufanumaru.pdf
    • https://static.usrfiles.com/ugd/0779a3_fea407ed2dd64d438daac449cddf1586.pdf
    • https://static.usrfiles.com/ugd/7e6083_49899fb4b14b4108a8347d577505d8c3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005364.bin
bb8cdb96131a12dfb20563b8c80764957877ff942ad18ea2483cbe546b8b3f64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5364 5404 bytes
font_01_sfnt_off0000658c.bin
973d12450103066a521f0979cb3220ae1f6c31641994805d605e6cdb3bc876e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 13748 bytes
font_02_sfnt_off000090b7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B7 4324 bytes

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