Malicious PDF — malware analysis report

Static analysis result for SHA-256 79737da675e3a008…

MALICIOUS

PDF

52.6 KB Created: 2020-08-30 02:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3c5689baa3df514206248e69f70b0d SHA-1: 169436ce08ebc7623e29772cb85d917b0946a0f8 SHA-256: 79737da675e3a00862303b96e9802abaa232aa4914bc9b0f7e21326d1502a446
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF documents. One of these links, 'https://ttraff.ru/wix?keyword=sound+of+silence+sheet+music+easy', is identified as a known malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious infrastructure, likely for phishing or malware distribution.

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=sound+of+silence+sheet+music+easy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bd27f96660aa42948bf6d071bee223fc.pdf
    • https://static.usrfiles.com/ugd/3eed2b_8b85195a42fb455b866f908d4ff30229.pdf
    • https://static.usrfiles.com/ugd/de02f3_160134b369834863b45cb69695da3387.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://static.usrfiles.com/ugd/b8c837_c558f0fe94124d7e8cb83514f51fbdba.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c858a73eb3447a9b3c756bf73a9a67f.pdf
    • https://static.usrfiles.com/ugd/93c935_5f92b560a0154118929eed2d506e4107.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/carne_asada_fries_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/buziv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/hernia_diafragmatica_nios.pdf
    • https://static.usrfiles.com/ugd/de65f7_376c28c646244a7890613c16cd3e2675.pdf
    • https://static.usrfiles.com/ugd/9219f8_597f9bdc163f4a32bc6400b104bfddf2.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006427.bin
dddd9cf62ea725626511d96bf23b7ffad6595bf21c0710aa11cff39a6e4ce9cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6427 5368 bytes
font_01_sfnt_off0000763e.bin
903dd4c5e54aecc604bbf02036c0ce7bb8ba8882e1ff855fc837ab26727b1f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 5996 bytes
font_02_sfnt_off00008a9a.bin
2da8ccd1fc5e294de9e738f0f5af646f36eff5db25c025ee3fd4d89b4916cebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9A 10440 bytes
font_03_sfnt_off0000ae3c.bin
7bf264205353c10a0c5dded29f82d2e4d5de75683e79649d1ed5fac631eb9302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3C 16608 bytes

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