Malicious PDF — malware analysis report

Static analysis result for SHA-256 67aae5866e48e43c…

MALICIOUS

PDF

42.4 KB Created: 2020-09-09 23:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54569140001dda62e258b617c3175135 SHA-1: 6a62b00b3eda67641d307fa05a0ad51a4de7bc44 SHA-256: 67aae5866e48e43c5ff58d8f4498bae4d8b4f2441d4a3986780b9755d468ca5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.club/pify?keyword=tent+groundsheets+uk', is identified as a known malicious redirector. The document body contains obfuscated text and embedded URLs, further supporting a malicious intent, likely related to 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.club/pify?keyword=tent+groundsheets+uk
    • http://files.grcchoirs.org/uploads/1/3/0/8/130813731/13c998d.pdf
    • http://files.lorrakurtz.com/uploads/1/3/0/8/130813357/jesubokewexokupasom.pdf
    • http://files.the-yard-milkshake-bar.com/uploads/1/3/2/6/132695818/df43950bf6dd.pdf
    • http://files.kamalfashionuk.co.uk/uploads/1/3/0/7/130776254/pexomesosijavow_pilanutaxodik_xujamuf_mofawiwijusi.pdf
    • http://kabifonel.stevemoorefoundation.org/uploads/1/3/1/4/131413718/guzazefefugef_lifirifirezuwak_pezug_fexalotit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ff2e72_0149c47e36f04f86a14ccf9d1ca7ee8b.pdf
    • https://static.usrfiles.com/ugd/2994dd_6e4a3bf7837749bbbf77feadb2d6ac9e.pdf
    • https://static.usrfiles.com/ugd/8de238_6b8a4abff2694bb994341babbccd896d.pdf
    • https://static.usrfiles.com/ugd/800b88_e6d27bd9d9044cea9c45725c39a315e1.pdf
    • https://static.usrfiles.com/ugd/89441e_93794a4ef67847aa8794bc2944cab026.pdf
    • https://static.usrfiles.com/ugd/440e29_9f2e0a2d43934f6e84410e2bad03f840.pdf
    • https://static.usrfiles.com/ugd/b7ab08_d46125f32538427abff1948ba2c0645b.pdf
    • https://static.usrfiles.com/ugd/8a419d_556a9d39aa0349d2b0372af456483d1e.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_off00005ed5.bin
7ed9f9db7574ee03fec05777bf8a733d55238722977708b903b3f2a22983ba33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 4860 bytes
font_01_sfnt_off00006f53.bin
9e2b800a5342983e2131b0ee37e99afe9956d74b4dbf5de99f4275dd71c41f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F53 2184 bytes
font_02_sfnt_off00007980.bin
c0753853b6e0398cc02df5fb4286901e20109143ae3d3c0906b0df87262d8396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7980 10212 bytes

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