Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0eb60b72042da8…

MALICIOUS

PDF

33.9 KB Created: 2020-07-08 17:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5518783908f1f6d4c44810a70d1fdad8 SHA-1: 0fe5b6f096fa62821d7e301369705f3e28e69dbd SHA-256: 6a0eb60b72042da88133361f345afdb132efd82a76cf78537d0542d1893d2f2d
154 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by embedding a large number of external links, identified as a PDF link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though obfuscated, contains references to URLs that are likely used to distribute further malicious content or lead users to phishing sites. The presence of numerous links suggests an attempt to manipulate search engine results or to serve as a distribution point for other malicious files.

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/wb?keyword=the%20dates%20in%20english%20exercises%20pdf
    • http://files.jakegrahamphotography.com/uploads/1/3/2/6/132696155/popekuwuk-nanudetirava-zigomevu-morix.pdf
    • http://files.kengoesclick.com/uploads/1/3/1/4/131437513/4c988cc4.pdf
    • http://files.skincarebyadrianag.com/uploads/1/3/0/7/130775827/6a94d7.pdf
    • http://files.ancientpromise.org/uploads/1/3/0/7/130739567/e3245.pdf
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdf
    • http://files.mendocinofood.org/uploads/1/3/2/6/132683088/6947927.pdf
    • http://files.pro-mx.com/uploads/1/3/0/8/130874575/a5a7f4be03008.pdf
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.theeclecticcats.com/uploads/1/3/1/6/131637325/fced1db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fizodudukuga.files.wordpress.com/2020/06/58961790434.pdf
    • https://zapafolut.files.wordpress.com/2020/07/41423051700.pdf
    • https://lujipur.files.wordpress.com/2020/06/bajotigebaf.pdf
    • https://riduvetixaxu.files.wordpress.com/2020/06/wivomazotap.pdf
    • https://xipunibeneta.files.wordpress.com/2020/06/muxopesejorizaxupowadanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.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_off000048ab.bin
220ebdd0812187195e26c174d970ef55b4252d456069bccd9f7f2cdb5c453c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48AB 5112 bytes
font_01_sfnt_off00005a04.bin
5af5afb3842ae2501e61545750ff00a984a57df2296d7774a31e2efe512bb9c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A04 9468 bytes

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