Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c79043430fd74bc…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 08:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b8fb63b49090c59addfb70ea28ee9a5 SHA-1: 230d7caa29bdeb2273acbaf992bf5a705a9b428f SHA-256: 2c79043430fd74bc14f67c6442017ddb01a598ffc4d84c9be058da994330fd3b
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.ru/wix?keyword=diary+of+a+wimpy+kid', points to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to distribute malicious content or phish users. The document body itself is largely unreadable binary data, but the embedded URLs are the primary indicators of malicious intent.

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.ru/wix?keyword=diary+of+a+wimpy+kid
    • https://static.usrfiles.com/ugd/b8c837_6292e7d7a3144f5985abb0f97e89cfc2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fea06ac913840e3b882f4a042104acb.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e07668e1ce740638d2bf153e34a7753.pdf
    • https://static.usrfiles.com/ugd/9734e7_ae9860ae1976474a83526be9e889eb81.pdf
    • https://static.usrfiles.com/ugd/2813e2_f364132840264e5a95b43df20fdc96f8.pdf
    • https://static.usrfiles.com/ugd/a838c0_51b65e7e5c664c3b891781aa5d628d7e.pdf
    • https://static.usrfiles.com/ugd/e02969_15fe50c8d2ed4e209baf1bfd2979f11f.pdf
    • https://static.usrfiles.com/ugd/824332_4ead648bb3dd4759a41e6bece9383389.pdf
    • https://static.usrfiles.com/ugd/aff7ca_81e52b826589493989efb54dbe972b18.pdf
    • https://static.usrfiles.com/ugd/2c8d66_e3b9577414e24ea99df3541898f760f4.pdf
    • https://static.usrfiles.com/ugd/a59130_20cb43cead2d4c2aa8694367cc9b6cfd.pdf
    • https://static.usrfiles.com/ugd/f0e51d_7bd38b37ddfb404fb79d7c87c7826536.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/xaxaranibixoxufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/buwoborikufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91489653134.pdf
    • https://cdn.shopify.com/s/files/1/0463/5715/1905/files/xafolujowunuvajinovor.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_off00007d32.bin
5e09079576f7adeecbe5620513a33b0b5b506bb61b48b778e0e565e5cf18df42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D32 5232 bytes
font_01_sfnt_off00008f0a.bin
4e9aa37c77d1f5d3de14feaf5c68189b52a9e0a74292ab76b88d07c57eef5606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0A 10648 bytes

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