Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e44ebe6aaf4105…

MALICIOUS

PDF

41.9 KB Created: 2020-09-06 14:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de201cd02c1ecef6945f9f5d35651e03 SHA-1: 9c5846cb861f674caa9bd5ad52fba4834fa5a78c SHA-256: 98e44ebe6aaf41056701d3fc342f779591f009ef9982693315b7a527e2ecf1f6
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a medical procedure document. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS firings strongly indicate malicious intent. The document body, though partially corrupted, contains the same URL, reinforcing the lure. The presence of numerous other PDF links, as flagged by PDF_SEO_LINK_FARM, suggests a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=procedimiento+para+colocar+sonda+vesical+pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/bawizidezejiweruvotutazub.pdf
    • https://cdn.shopify.com/s/files/1/0435/3032/2071/files/blaupunkt_car_2003_radio_code_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/witos.pdf
    • https://static.usrfiles.com/ugd/b47706_722c70fd357644beb392b76815e9b7a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5c3eec5cda04c8e9819206fed996b30.pdf
    • https://static.usrfiles.com/ugd/48bf55_cf8596ed71bb433baa73069d2f9f0cba.pdf
    • https://static.usrfiles.com/ugd/ac8c68_807e606835044ed4b231f0e8933936b6.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/89469461133.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/jojufuze.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/kalupunuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/46414960858.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_off00006384.bin
1dea17dd2fada7e4f4213ec97896d98a74ad0c3ba69a46a465d30c828ddc6651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6384 5364 bytes
font_01_sfnt_off000075ad.bin
366e08b33678f96afbc79559548de9fa47a09dfe4c3046cc5542aa9eb3c783bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AD 10796 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.