Malicious PDF — malware analysis report

Static analysis result for SHA-256 07db6e1f12e7fccf…

MALICIOUS

PDF

41.6 KB Created: 2020-09-03 05:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21db7c16746dc2fab219c042d74d2e24 SHA-1: 8c3464fa3b29d4fdc05c223eae582096ded5b4f1 SHA-256: 07db6e1f12e7fccf16c67cfdc6d08a4ac4e9851c5efb1cca1f4209a4ef658b3f
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc, suggesting an attempt to lead users to malicious content. The document body, though heavily garbled, contains keywords related to Microsoft Publisher and a URL that aligns with the redirector heuristic. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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=microsoft+publisher+capability+statement+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c1c462_0bc047e124ae4de989f78d227823b726.pdf
    • https://static.usrfiles.com/ugd/33a2e4_2c404f80b5424d2d8b4f3144fa92fe8b.pdf
    • https://static.usrfiles.com/ugd/ac72e0_93d90df26f3e4937b4900986cc4ffeab.pdf
    • https://static.usrfiles.com/ugd/d1d005_6e85e894c3d147e5a41d92054908c00f.pdf
    • https://static.usrfiles.com/ugd/90423f_f42aac5d6fa047cf9d4800c9bae612a9.pdf
    • https://static.usrfiles.com/ugd/3649d2_84cc26e09ed441638f6a4f85bf3c53d2.pdf
    • https://static.usrfiles.com/ugd/92ee2b_cc3bd4deaacf42b28a983ea2192e58ea.pdf
    • https://static.usrfiles.com/ugd/79e0dc_7c493acd30eb4e6a9ad63fcdab4b101c.pdf
    • https://static.usrfiles.com/ugd/74c34a_d1f7af5c5bae444d8c72e23cbc670b25.pdf
    • https://static.usrfiles.com/ugd/0d018b_8b47eec4ac014b2db836abfcb45eee06.pdf
    • https://static.usrfiles.com/ugd/11f207_4675c095fcbd4fee962bf599fa35bc7b.pdf
    • https://static.usrfiles.com/ugd/cb2bed_4e8c4dafdfd84b789b9b2bd1e8a7ff3b.pdf
    • https://static.usrfiles.com/ugd/b88e3d_429042fcb48c48b09454a42993c0f221.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bb78c9e5d064837b2103118abe422fc.pdf
    • https://static.usrfiles.com/ugd/aef5b7_839a4aea39dc401dbb02facb6a6e91ce.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643a.bin
1f4f3a118cc2c994f200f789db445614d5e38d2de489ab6a083b4816460c7707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 5500 bytes
font_01_sfnt_off000076da.bin
613b00ae79bdaeb1716e87675d4997592b8c60835ee6d5c969cd02ea5fe6ab47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 10084 bytes

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