Malicious PDF — malware analysis report

Static analysis result for SHA-256 15193f317e48c493…

MALICIOUS

PDF

37.4 KB Created: 2020-08-31 09:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f25cb1de2cd0c8932d1c4fc507b5e756 SHA-1: 5cac0830e1575312bfa99b2c9e39e967414900ff SHA-256: 15193f317e48c4938e5597869a75f8a587b42aecba7a62c02840a73d5ede9e75
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary URL, https://ttraff.ru/wix?keyword=summer+fun+with+ace+and+christi, is associated with known malicious redirectors. The PDF_SEO_LINK_FARM heuristic further confirms the presence of numerous links to other PDF documents, likely part of a link farm strategy to improve search engine ranking and distribute malicious content.

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=summer+fun+with+ace+and+christi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/21a131_15fe733ef9f3411ba0a38ad089391da4.pdf
    • https://static.usrfiles.com/ugd/158fb9_8777fc51959b4991b21a339ec446ef67.pdf
    • https://static.usrfiles.com/ugd/2b25e8_9240070fb02f48c68b3d385ef9f6b12e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0893b9117fc24951aa6f7b0ce4139260.pdf
    • https://static.usrfiles.com/ugd/e745be_15724527f7354cd09a9b99d8686befa0.pdf
    • https://static.usrfiles.com/ugd/bfbc46_a315ddac5c014ec6bddb03cc1ada0e1e.pdf
    • https://static.usrfiles.com/ugd/41a0b6_07e0065edb234b3c961af99e4ae5f460.pdf
    • https://static.usrfiles.com/ugd/b8c837_13c6e15a2bbb44e0960c249ea6c64255.pdf
    • https://static.usrfiles.com/ugd/69695d_4ca73945abf44b0c894459c9675b130d.pdf
    • https://static.usrfiles.com/ugd/b8c837_779a8f071e7742d2b48e30c0235c4d51.pdf
    • https://static.usrfiles.com/ugd/d3758e_e252cc5ef28941da9e6a89fcc6eacc58.pdf
    • https://static.usrfiles.com/ugd/89064d_f1a6c101d39c4135b4a0fde10e42fc4c.pdf
    • https://static.usrfiles.com/ugd/18f527_8d9ce8a357694968ac6e9f3d3f0fd20c.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/78814882891.pdf
    • https://cdn.shopify.com/s/files/1/0438/1917/2000/files/descargar_autodwg_to_dwg_converter_gratis.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_off00004887.bin
e60c5465378d1c76cff7d351a833fc05f60e1c55f9a41cf0fd0d19314fc56651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4887 5196 bytes
font_01_sfnt_off000059ff.bin
3ad45a4655a652f8e2cb125e117badc658cea24eea297fd48a97f6993d5e44f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 9488 bytes
font_02_sfnt_off00007a87.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 4324 bytes

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