Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b93c15b30d9cf8…

MALICIOUS

PDF

49.7 KB Created: 2020-08-30 05:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e3e2e1f6c7647f5cd53b00d3c04f17 SHA-1: ebc84600997be33ad611c377a8a25d13317dd63a SHA-256: 69b93c15b30d9cf8e8a88f2fd7493fe47f26d712e5f850d2d9c5093dfa606ddd
202 Risk Score

Malware Insights

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

This PDF document contains a malicious redirector link and a large number of external PDF links, characteristic of a link farm. It also employs a social engineering lure, specifically a browser extension or update installation prompt, to trick users into clicking. The ML classifier strongly indicates maliciousness. The primary malicious URL identified is https://ttraff.ru/wix?keyword=zone+alarm+windows+10.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=zone+alarm+windows+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_dd7b245c3f97477db917eeb81f262350.pdf
    • https://static.usrfiles.com/ugd/77d535_6b11392f47fd4aa0b05a0ec0ff1f6557.pdf
    • https://static.usrfiles.com/ugd/c8a981_ffa9347f5cb34a029376c30f84b02709.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_7527b00550574317935728c52d2d9382.pdf
    • https://static.usrfiles.com/ugd/ddb60a_52a990a6898341028dbc7d273bd488b4.pdf
    • https://static.usrfiles.com/ugd/856cea_7ac4df176fe8408394108b4ac0e9a668.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd2509dd60c8478d80cab159c50a1e43.pdf
    • https://static.usrfiles.com/ugd/b8c837_e544b226006a4015a887df195cc95714.pdf
    • https://static.usrfiles.com/ugd/0779a3_9bfc072ab93f49c39e23c789cba1a724.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9a5f1c605a6426e87f9e7d95393b706.pdf
    • https://static.usrfiles.com/ugd/865d50_da31ce5db3344a4ab260364367ff0053.pdf
    • https://static.usrfiles.com/ugd/b8c837_4493b3712e744fbdae29f68889328556.pdf
    • https://static.usrfiles.com/ugd/ea78e0_47c07aa6133847d8acc116f707d43452.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fabe0c4f734b85b60c8473cbeac064.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_off00007758.bin
f4aa586f671da6710ed9e9b801a996d00e52cf93e5aec92c52bf1bb96119ee29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 4924 bytes
font_01_sfnt_off000087fe.bin
61070f43521f51db7641758acb2c44450f41409ae1a82921683c313ea02a8145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FE 10448 bytes
font_02_sfnt_off0000abc5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABC5 4324 bytes

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