Malicious PDF — malware analysis report

Static analysis result for SHA-256 06aec62597ed4e32…

MALICIOUS

PDF

104.8 KB Created: 2020-09-08 12:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e10976e53d7099ec2311f38c98b82b7c SHA-1: c38a70f1579b3977efca7cb6dc3f043107c262c3 SHA-256: 06aec62597ed4e322f059ae6fdbb352b0932f36542a7ad7674937f340e32353c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a medical keyword. It also hosts a large number of other PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the embedded URL is a primary indicator of compromise.

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.cc/wix?keyword=subclinical+hypothyroidism+in+pregnancy+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/ef7b09_f148fce9c4ff4e709a170b32f66275f1.pdf
    • https://static.usrfiles.com/ugd/353d00_edd718dfb70249228af8b96a3d590050.pdf
    • https://static.usrfiles.com/ugd/105a8c_585fa36be4fe4574b642837801ff6e3a.pdf
    • https://static.usrfiles.com/ugd/1b7c00_66332c10802d41c8bad9cce946c31883.pdf
    • https://static.usrfiles.com/ugd/6908d7_73ab02bb4c8a426587be07a280527a4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_195e06c7da894170a91d6081932901e9.pdf
    • https://static.usrfiles.com/ugd/a838c0_d5e969f8df3e4d34957c1a6a65f24fb2.pdf
    • https://static.usrfiles.com/ugd/dcc11b_f56b58d7cdf64fa08c5d9ee7ac6c0fdc.pdf
    • https://static.usrfiles.com/ugd/cc207a_487dda0102da4721a2edb050fd43320e.pdf
    • https://static.usrfiles.com/ugd/88a84f_0152ba20f2da4d41b7f1c4705b9dffcd.pdf
    • https://static.usrfiles.com/ugd/e2c250_fa4d0a1d212e497b9c7f48e534ba4d02.pdf
    • https://static.usrfiles.com/ugd/bae0a0_bedb19da71064c7a90cd027b35dae919.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/16793503697.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/12816351587.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_off00013026.bin
7677eb9086d32bc526b34e37831ca249a7424bfb53c6e1688c22ab8aafbb884a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13026 5796 bytes
font_01_sfnt_off000143aa.bin
a8c5f73c07e5db0c906592e2138f1b3575d8c44ae57209b1791eb6b1660a8996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143AA 14828 bytes
font_02_sfnt_off000171ee.bin
49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171EE 16148 bytes
font_03_sfnt_off000186e4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x186E4 4324 bytes

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