Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e640ff601ecba3…

MALICIOUS

PDF

114.8 KB Created: 2020-08-31 10:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9844adb737431a59979abc4e74ca9cec SHA-1: 2af4f5daa78b644a6fc658b3726755c4bda132b2 SHA-256: 33e640ff601ecba32229ca5ebf9432574f561c1e23bdfca55e5875faae25e3aa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

The PDF contains a lure to copy/paste content into a shell, indicating an attempt to trick the user into executing commands. It also hosts a large number of links, many pointing to external PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is ttraff.com, which is flagged as a redirector.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.com/wix?keyword=audio+amplifier+repair+guide+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/253000_af6b3bf4841a470fb4fff912cac3f780.pdf
    • https://static.usrfiles.com/ugd/d5d855_d5e2cc671b7e4974be1cc11563571667.pdf
    • https://static.usrfiles.com/ugd/74c34a_7664d77f5a4c40ac9d672c87199a7e79.pdf
    • https://static.usrfiles.com/ugd/b8c837_707dd770c9d44046818d941c272db7f4.pdf
    • https://static.usrfiles.com/ugd/6cfc61_351d3c957d6e465d873e47a3b761f4a2.pdf
    • https://static.usrfiles.com/ugd/23b571_fa92e0995663460a9722993485e4912b.pdf
    • https://static.usrfiles.com/ugd/e4a001_dd18d365c9144bddba536bd93636fec5.pdf
    • https://static.usrfiles.com/ugd/921909_4cec9f2e3a604489bbcafe4aab00f036.pdf
    • https://static.usrfiles.com/ugd/5ad03d_1e1368e069db4a9a88d66cf6ffe8db93.pdf
    • https://static.usrfiles.com/ugd/af0aa9_53125de1217b42b78920c6c60a6a3873.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_55c4aa307d124e1a97ac07f6814fca1c.pdf
    • https://static.usrfiles.com/ugd/a382ee_136ccd016c664c229387d68dde3ef549.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_e8fda03e640345608ff559bbad8af665.pdf
    • https://static.usrfiles.com/ugd/b8c837_b01b54efad984754a2f8fd1c8321ce2c.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_off00018741.bin
e5e638ef28e447736bdd37e924e4925ec56a5661c9ba930c82065cd30b86fdbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18741 5172 bytes
font_01_sfnt_off000198c8.bin
3175687084cf52f044a711edc73036a8e234cb7ed278008e881be2f879fdb33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x198C8 10712 bytes

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