Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f7f6d75c8ca4f4…

MALICIOUS

PDF

44.3 KB Created: 2020-09-18 14:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a53fe8e6c0ee4089ed031851af7f5d98 SHA-1: 2556a723d7cd6d7837e5a264131515f752fdce4b SHA-256: e4f7f6d75c8ca4f42f035d93b39781df4550d1cf87ca74d011576e3ce569c920
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure or suspicious domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful sites. The document body, though heavily obfuscated, contains the URL https://ttraff.link/wix?keyword=moleskin+for+blisters+on+hands, suggesting a lure related to medical or personal care topics to entice clicks.

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.link/wix?keyword=moleskin+for+blisters+on+hands
    • http://files.yestocake.com/uploads/1/3/1/8/131856374/nivuf.pdf
    • http://dulegem.iconiumbackpacker.com/uploads/1/3/1/6/131606407/2275511.pdf
    • http://files.morningwoodaz.com/uploads/1/3/0/7/130739658/0cb18.pdf
    • http://widapiwe.ecogpainters.com/uploads/1/3/1/8/131858661/6c4c6268.pdf
    • http://midumif.talkingtoyourdoctor.org/uploads/1/3/1/4/131437736/tijadomagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/sap_crystal_report_designer.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/57405341071.pdf
    • https://9c2ceb4b-0869-4790-8504-b32a33da27d9.filesusr.com/ugd/edb4a7_4ce2043792db4d43974e9ad780efd658.pdf?index=true
    • https://6278ca19-d43e-4589-aece-e483d4f5e2bf.filesusr.com/ugd/c4dbd3_2222f5bac1334bb292c0f0d049301b6c.pdf?index=true
    • https://86dced9c-63b4-4262-88d3-43791f924fc6.filesusr.com/ugd/2d1648_ada8435f3fb0493da892b12ea6222602.pdf?index=true
    • https://63486aed-8765-4aaa-a98a-ae55083adc6b.filesusr.com/ugd/3bbd68_7afe26b61de34f51aa9f8d732ed82417.pdf?index=true
    • 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_off00006214.bin
b2c2750cfa4565555acb79df1b0b3f4f3005da9938d446a68b0b55bc54148ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 4992 bytes
font_01_sfnt_off000072fc.bin
f153a7901f01993a2deabd4f8206e4b999e9f5803e2e00fcc9822c9a89a7d7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 10424 bytes
font_02_sfnt_off0000969c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969C 4324 bytes

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