Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09deab7cb05a469…

MALICIOUS

PDF

42.6 KB Created: 2020-08-25 19:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50d8fb1db6a0f7c45b15fea69db9660 SHA-1: a4b8521d5c7b4a978104b8f4dafe702d0052fbb0 SHA-256: b09deab7cb05a4690dd23310f3cbcad7b09d3e160339a0f8fb32dab670cca948
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm designed to manipulate search results. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates maliciousness.

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.cc/pify?keyword=a+level+physics+2019+paper+2
    • http://files.shopmindfulminerals.com/uploads/1/3/0/7/130738875/nebifazutadofof.pdf
    • http://files.theredthreadapothecary.com/uploads/1/3/1/6/131636654/4ef3a.pdf
    • http://lusinix.wolfwoodsstudio.com/uploads/1/3/1/4/131407558/sogif.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/97147075616.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/tikuli.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/98814834001.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/81306936440.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/fotusupodofawosejatizoxew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/21170647531.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/64119760584.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/74149914149.pdf
    • https://cdn.shopify.com/s/files/1/0464/7301/9560/files/bjt_biasing.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/rokozikivegemelaw.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_off000067e2.bin
8fb7296bb44240327e38bd9ca4ef0e2b06adf69b425a0aa719ee38383a0fb206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E2 5652 bytes
font_01_sfnt_off00007b22.bin
f63871ca196e4481b5f6656886d2bdb4f4a74bdcf222dce5d912c7b155f0577d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 10600 bytes

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