Malicious PDF — malware analysis report

Static analysis result for SHA-256 0666e10968ee5612…

MALICIOUS

PDF

50.7 KB Created: 2020-08-30 14:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1884f87df5f37e20c6d3405c7a76bb6f SHA-1: 7cc1d9663224a606f8ec4d68fd3eda682a9d0105 SHA-256: 0666e10968ee5612a84369bc88f6c2e0ffd74fc4ff6652014575d32c33d21608
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to a link farm designed to generate traffic. One prominent link, 'https://ttraff.ru/wix?keyword=company+daily+expense+sheet+excel', is identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking these malicious links, likely leading to further malware or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=company+daily+expense+sheet+excel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_9fc9a486b9604967a546ce3f8cd15726.pdf
    • https://static.usrfiles.com/ugd/b8c837_8561ea4ef212406ea4f6aa3007d15b07.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c70c5fef769446a9a699c2997dc841cc.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_b685b2923198453ea0eac2e37b10ca3f.pdf
    • https://static.usrfiles.com/ugd/34ec99_bbe625af758b4c54bf0e29aea663c2d7.pdf
    • https://static.usrfiles.com/ugd/05900a_fcc4ac0d99114e0a89ea1ce15f816e5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ae98099124d4e1a86b3c9530ce728b7.pdf
    • https://static.usrfiles.com/ugd/c5d40f_d21d3f40ab6d4e57a80f7a217536a0eb.pdf
    • https://static.usrfiles.com/ugd/4b7290_03b2a9cf851f401aaee1924bea5c8fc0.pdf
    • https://static.usrfiles.com/ugd/3ce946_58bda787024a48e79103e63ff32c16c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc679750b13547dd99d7637bdc02d937.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_off000078b5.bin
36f00c68d28b52aedeb6c896838658cae6af9d8518e867ac0bf717c2c6802d03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 5200 bytes
font_01_sfnt_off00008a40.bin
07b9f268f655fb212644df3b720057a15f3cef29569d44bfdfc4dcee01c64555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 11144 bytes
font_02_sfnt_off0000b02c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB02C 4324 bytes

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