Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cef71d17cd99196…

MALICIOUS

PDF

44.3 KB Created: 2020-09-01 03:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26a9e814df108bce3a412ecbad27b4d SHA-1: 8eb7a140e4616993715c884c4333c37b0c53ba4f SHA-256: 0cef71d17cd99196c149c8830440c1835491ecab9acf377ccd3e677d3c1e2a17
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.cc/wix?keyword=aoe+3++iso`. Additionally, it features a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The presence of a 'download button' lure further supports a malicious intent to trick the user into interacting with the document. Although no scripts were explicitly extracted, the PDF structure and malicious links strongly suggest a phishing or malware distribution vector.

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.
  • 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.cc/wix?keyword=aoe+3++iso
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f09a9d_3d84ddd37bae40cf9b117186391982ad.pdf
    • https://static.usrfiles.com/ugd/6908d7_740138c8abf1496f9bbab2a897822832.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd536a2a81474067928e9b4219d4662d.pdf
    • https://static.usrfiles.com/ugd/ab922d_5e10c2edc8ed401abbfece5026b67ae8.pdf
    • https://static.usrfiles.com/ugd/5b5da7_8eb91c46b0be4f1ebe1f161398a57029.pdf
    • https://cdn.shopify.com/s/files/1/0461/9852/2014/files/home_depot_sheetrock_lift.pdf
    • https://cdn.shopify.com/s/files/1/0437/4629/5959/files/90210001723.pdf
    • https://cdn.shopify.com/s/files/1/0446/8090/4857/files/93313218134.pdf
    • https://static.usrfiles.com/ugd/07625c_e3345198f0584e148168c458626d04d3.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_c5a7e0a794f64dbe8abce9e4a92c94e9.pdf
    • https://static.usrfiles.com/ugd/cc15ef_0e4143840f994401afc2ffbf45304e4c.pdf
    • https://static.usrfiles.com/ugd/0f5b72_840b8bcb74874257918572262b1b7ec4.pdf
    • https://static.usrfiles.com/ugd/067ecb_db8293ae4e9f4b2d8109ca29035f52fd.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_off00007208.bin
ccb4b87db0d375aa0d031d82ee774d74881cf230d202893f7e5813ee4da5d8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 4496 bytes
font_01_sfnt_off00008169.bin
9514fdcd614dc9fdb8bad6b638a335118f216245058cd0e8d99e32baa212a782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8169 10424 bytes

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