Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb52fb53a04c90f…

MALICIOUS

PDF

57.4 KB Created: 2020-08-30 22:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1917a635d387b90743dd278fbc3af283 SHA-1: db8359e34b14ebd3d9e653e96e447679971f69fd SHA-256: 0fb52fb53a04c90f6dcaec3c9b6b556f50ce669ebb62809fcfbfb2c0f6d1a013
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 a link farm designed to obscure the ultimate destination. One of the primary links, 'https://ttraff.ru/wix?keyword=pokken+tournament+weavile+guide', is flagged as a malicious redirector. The presence of numerous links and the use of a redirector suggest an attempt to lead the user to malicious content, 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=pokken+tournament+weavile+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_9dd735709d854609871dd0341f59683b.pdf
    • https://static.usrfiles.com/ugd/f84671_39c152daf3ec4323abf8c89418260949.pdf
    • https://static.usrfiles.com/ugd/f46427_f924d63a649c41ee9c6a1c40bf59a68e.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_05a6ffcbdf554cb287381fced6da375e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0f034a21b39484ca9803036e72f6feb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/community_service_log_sheet_for_probation.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/chilton_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/wavowanubedujuparaxula.pdf
    • https://cdn.shopify.com/s/files/1/0435/8841/9741/files/danisetu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/modizik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/baluniruwekasoraw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/65408199190.pdf
    • https://static.usrfiles.com/ugd/8acad3_cd7f1d0c234c46d7bb5bf6f35045fd00.pdf
    • https://static.usrfiles.com/ugd/f63f29_1adf8894b9e4470d895aa6a10ee093ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1b63a1a5464ea5ad75349c5086a720.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_off00008f27.bin
bf29f9d57fc88e9d414c50d9d15c893fe599dd5c04d8daf6cd2f84086e675165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F27 5068 bytes
font_01_sfnt_off0000a060.bin
21ebdf328c36a3bcef54aed29347909ea0e14334a3d150a8ab5719481e28b2c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA060 13532 bytes
font_02_sfnt_off0000cabf.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCABF 4324 bytes

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