Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44094c58ef72f83…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 16:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0314f0bc19805941a68bee85a9707d5e SHA-1: 50cc7c7958c87f8d5a247225527e46f406f30b16 SHA-256: d44094c58ef72f83214192c43936628843d74634f933940465f3ab37d3abb947
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=cfpb+regulation+z+examination+manual, which is likely intended to lure the user into clicking it. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=cfpb+regulation+z+examination+manual
    • http://files.supportwestlake.org/uploads/1/3/0/7/130740110/bodad-zabup-forupema.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/45065221140.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/pivibonurejenox.pdf
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/39970867817.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/99475111429.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/42310283499.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/accounting_period_definition.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/42919527636.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/bowowilurosemurari.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/nenunesajemenixekak.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_off00005caa.bin
12342504720e4bb588958d01b40aedb2bb033617d5a18882a248ec1b92cc7d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAA 5204 bytes
font_01_sfnt_off00006e5a.bin
6301107ec6607096ccd7a501be4ed36b0637076a22abffbbb62a1f4726e06360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 9996 bytes

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