Malicious PDF — malware analysis report

Static analysis result for SHA-256 7578bf486f7b5d6c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 22:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f34c749a49a74a2d6d94e4fef57a6373 SHA-1: 6baeae4d88e21a13db8cdabf8903561b36601f02 SHA-256: 7578bf486f7b5d6c02b9be05323510c671d43af5e0438db67a86fd8f1e3e5c43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that these links are part of a malicious redirector infrastructure, likely intended to lead users to malicious content or phishing sites. The document body, though partially corrupted, contains the same redirector URL found in the heuristics.

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=flown+the+coop+breath+of+the+wild
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_d57a875f48484ecb9c7ba2770793a251.pdf
    • https://static.usrfiles.com/ugd/b8c837_afc8f188e4a548d1bacb7fcad7aeffd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ccc27ae87d3470b8452156fc45d0996.pdf
    • https://static.usrfiles.com/ugd/625844_6244d25ab7104033834b78e153c24949.pdf
    • https://static.usrfiles.com/ugd/b8c837_d29235c1929843d69cb03509ddb847cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e410d01fb5eb4f5bae7a3678bc2012ba.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/pdf_aristoteles_e_dante.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/apache_tomcat_installation_guide_windows.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/standard_form_into_vertex_form_converter.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/tamusobiguduvomamoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6161/files/kojobe.pdf
    • https://static.usrfiles.com/ugd/804ff6_3d5e8366dad341e8bc7ab8aef1629de3.pdf
    • https://static.usrfiles.com/ugd/253000_6fbcd4b5a5344630be9bb48e0bff51a4.pdf
    • https://static.usrfiles.com/ugd/d54300_5be8b7633bda410d89639899139dde43.pdf
    • https://static.usrfiles.com/ugd/b8c837_d457b9076ddf4cb4a6e51fa9596e6b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_a054bf630dbb487b9970bd36e6cc5104.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000516c.bin
789d51b3338a15bb5b9628f986fb1c8989565e4f409514f87b2a96e655171009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x516C 5040 bytes
font_01_sfnt_off0000628c.bin
6d27e6b796ff1c829bd22e20208aa324e390ccf37efdf419ec7351e7ce0ed588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 9684 bytes
font_02_sfnt_off000083b4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B4 4324 bytes

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