Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabeec3417480f04…

MALICIOUS

PDF

39.7 KB Created: 2020-08-30 12:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dbbe571008036745f4a7d9e971b3260 SHA-1: faeb15df24f381101bf86001ab01caad3a80a3d3 SHA-256: eabeec3417480f0458a825b02a07a70b56f9fef492300383c2f962de73a01ae4
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/wix?keyword=eu4+irish+ideas', points to known malicious redirector infrastructure. The ML classifier strongly supports the malicious verdict. The document body appears to be malformed or heavily obfuscated, but the presence of numerous links to external PDF files, many hosted on static.usrfiles.com and cdn.shopify.com, suggests a coordinated effort to distribute content or manipulate search results.

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.cc/wix?keyword=eu4+irish+ideas
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/zosidiluvepegamat.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/topovuzosupasilodakuru.pdf
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/atherosclerotic_plaque_formation.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e6c9b4ac71343a5b67e9dac467c4afb.pdf
    • https://static.usrfiles.com/ugd/95089d_9ff784d0c6114e3ea34c4a12716eee1a.pdf
    • https://static.usrfiles.com/ugd/7f46b5_c51c03e8251e47729c4bd02e361f42c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_991e4aabd90e40d9a871c1730d796e90.pdf
    • https://static.usrfiles.com/ugd/565485_9228fac5c8e047e3a3ad1178b55bec17.pdf
    • https://static.usrfiles.com/ugd/2ac701_90babb9464c94b699d38284ba6c4e562.pdf
    • https://static.usrfiles.com/ugd/a771bd_648753a82ada4f5d8e803c89f40a7e5e.pdf
    • https://static.usrfiles.com/ugd/6cfc61_e18fd5b64caf48bdb756a9f2bbfb9596.pdf
    • https://static.usrfiles.com/ugd/fe83c3_2079fd2faa074fb69ce72e569707b945.pdf
    • https://static.usrfiles.com/ugd/0f5b72_6181edcc78e14cbdb10dadc0d598e0e5.pdf
    • https://static.usrfiles.com/ugd/e3c460_766487ec6aa349b1963392cc452116f1.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_d5fb9c3cca23457a8f517ebbd363bada.pdf
    • https://static.usrfiles.com/ugd/b8c837_16dc2e97a4ea4aefa879417699f4ae95.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_off00005ec5.bin
9d0a23370c14e919aef5123b9d22a4ced29b152c8703a68ebe302d74617693a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC5 4928 bytes
font_01_sfnt_off00006f7c.bin
4ff37590e24960cfdcaf79ea204f34f2e00d883dfe39354285fa6f4501dab119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 10260 bytes

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