Malicious PDF — malware analysis report

Static analysis result for SHA-256 0846cc1f16b4e04c…

MALICIOUS

PDF

36.6 KB Created: 2020-08-29 06:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f52eb407bdfedaa6fac9c032031146e SHA-1: 32faa855094ab5ea2c2a187ea28fd98022b0c28a SHA-256: 0846cc1f16b4e04c5279add11f3a03987dbb25d1ed8ec7da3311f75855ddcb74
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a primary malicious redirector at 'https://ttraff.com/wix?keyword=futbol+en+vivo+hoy+gratis+por+internet'. The document body and heuristics indicate a lure to click this link, likely leading to further malicious content or exploitation. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=futbol+en+vivo+hoy+gratis+por+internet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1b398b0a866e4949ac8a67de1f87e682.pdf
    • https://static.usrfiles.com/ugd/b8c837_12d3a3c1e10e4ede814578c8fa38c216.pdf
    • https://static.usrfiles.com/ugd/b8c837_6903332262864fe29263e593f599942b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/gamini.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/15773668125.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/pubamug.pdf
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/dodizefap.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/ascites_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/10217647892.pdf
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/buchungsbesttigung_hotel.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_off00004687.bin
f003a8584d0584e862b77aed9d7212e6c8094260373b5538ad7a868f89c2cb61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4687 5340 bytes
font_01_sfnt_off000058b3.bin
ed54a70326b8770343a750b23cd6ae75fc7f0be737c1e6fc524d27138a59fbfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B3 14796 bytes

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