Malicious PDF — malware analysis report

Static analysis result for SHA-256 852116e4f8c54c2d…

MALICIOUS

PDF

34.3 KB Created: 2020-08-21 01:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1b98521a53d35daf853d6396bff4f5 SHA-1: b1edc9c42fe705ff4db2a92c33ce48daedda1e21 SHA-256: 852116e4f8c54c2d33ddbc51ec64dceb3a24131911173ca885f8ea3daf764d0e
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One prominent link redirects to 'ttraff.com', which is flagged as a malicious redirector. The document body, though partially corrupted, appears to be a lure related to a 'Bowmanville weather report hourly'. The combination of a link farm and a malicious redirector suggests an attempt to lead users to 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.com/pify?keyword=bowmanville+weather+report+hourly
    • http://dulazug.wkelearning.com/uploads/1/3/0/8/130814855/978dade0819bdb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wozofedotomutigetipire.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/51243912356.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6760/files/62444758932.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/9476898860.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/nesebasoxinerajib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/1243716996.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0532/files/kutavagalut.pdf
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/rutiruzibupoze.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/pharmaceutical_analytical_techniques.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_off000042c0.bin
9b0deebe26413b88a8b2788dfefb147713e27f2513e31293172d34e80a465f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C0 5184 bytes
font_01_sfnt_off00005448.bin
1c9b652d9a50061ee42edb93cb0bd45db11bc2365dcc2dd9b0935a7cdb07b5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5448 12948 bytes

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