Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56c7796a2bee254…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 06:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c67c32fb24228707d8848b4c5da0ca57 SHA-1: b2728b44b1a0f09d2576d35dd6a65ac8b4258ab6 SHA-256: c56c7796a2bee2544c2ab3176e5306980d316ce74f8997feb0a0ee3c04b384b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely designed for SEO manipulation or to distribute malicious content. No scripts were extracted, but the presence of numerous external links suggests a redirection or content-loading attack pattern.

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/wix?keyword=wedding+cake+sims+4
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/5143019242.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/pukegolejogijefagamo.pdf
    • https://cdn.shopify.com/s/files/1/0447/9080/8737/files/sodumumod.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/nitukova.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/98717905691.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/astral_projection_guide_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_80fc8956b0284f16be8a7e13681e53e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_39521c72e508469eb1881f03761e2d75.pdf
    • https://static.usrfiles.com/ugd/b8c837_26cc499ca283404f82a3a6fd1d78947c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f45b8b58a4640e09e609d11f7edfd62.pdf
    • https://static.usrfiles.com/ugd/b8c837_22419d5e27a1413a9806da59d1aaeb76.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_off00006a0d.bin
2e564405298f937b070d1570f94149f0a5d0ab446ddad3d0f43e0995f70e4781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0D 5296 bytes
font_01_sfnt_off00007c16.bin
537e88fc6caeea1a0147f226944b90d04a8f59e17cd2b73fe728976d0d246fc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C16 10172 bytes

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