Malicious PDF — malware analysis report

Static analysis result for SHA-256 938bd71212e12252…

MALICIOUS

PDF

71.3 KB Created: 2020-10-17 01:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b161c7d8ba322ad7ca228fe984aab58f SHA-1: 42c8e6db1744e2cccda88a484447c3d46487ac72 SHA-256: 938bd71212e12252427624cae21757fb2bcb12a5633988f7b66452769931bfe7
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, disguised with a keyword suggesting legitimate content. The PDF also hosts a large number of external links, many of which point to other PDFs, indicating a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious verdict.

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/123?keyword=behavior+management+strategies+pdf
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/9813403.pdf
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/16805.pdf
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/1d32287.pdf
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/zolanodoxo_kemago_sokasa.pdf
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f877a8da7642.pdf
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f8a0b89985a7.pdf
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f89ee1cdb4b0.pdf
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f888ac3d9b86.pdf
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/lilozu.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tamivejogu-fipurigewa-rofeku.pdf
    • https://uploads.strikinglycdn.com/files/1c71f28e-d17c-4990-a408-784bc17405b6/27546440085.pdf
    • https://uploads.strikinglycdn.com/files/0423a20e-3b5f-4100-a4c0-3f1f74454f1f/bepovuvipapok.pdf
    • https://uploads.strikinglycdn.com/files/216fe934-d6a4-4668-960e-3979d7b2faa1/witodegulemukunikojixevo.pdf
    • https://uploads.strikinglycdn.com/files/e673ce39-04df-41f6-9b7c-520bbd063787/because_i_love_you_max_lucado.pdf
    • https://uploads.strikinglycdn.com/files/f52887c5-6229-4b0f-a0b5-dbd2c779b7ad/dikusuxez.pdf
    • https://uploads.strikinglycdn.com/files/e9e03028-ddee-4a0a-92e4-b05db53f90a6/xoveba.pdf
    • https://uploads.strikinglycdn.com/files/43c73d0e-8d9d-485a-9a08-962aa4f5df08/45092085341.pdf
    • https://uploads.strikinglycdn.com/files/34fe312a-3565-4439-9a96-04dc305e03f2/laripurutagob.pdf
    • https://uploads.strikinglycdn.com/files/617cc1a8-7772-41c5-91c0-470364ad5762/57396127866.pdf
    • https://uploads.strikinglycdn.com/files/06030584-7c83-4ff6-8f1b-085a2aab9142/77172092701.pdf
    • https://uploads.strikinglycdn.com/files/b9f52935-77fc-427f-aff1-2ff37c6b8324/68236725603.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/
    • https://uploads.strikinglycdn.com/files/216fe934-d6a4-46

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d919.bin
b81717fc43125ba8b7e9a5be3793da09af41f9de1a70042101b6c6507c960d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD919 5532 bytes
font_01_sfnt_off0000ebcb.bin
429065c815d5ae626cea3894750cb1d928b317c2f9c0fe25442bbc8c0b24fba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 10572 bytes

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