Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec442e6390f412b9…

MALICIOUS

PDF

169.7 KB Created: 2020-07-09 14:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a48192651f02f8ec624f21e6b3b7404 SHA-1: 9af6ff27e8e790dd1ea3a44186a13423f42c02b1 SHA-256: ec442e6390f412b9598fd93af5ba869062d889134336f8f530bc881d0d30874d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with high confidence. The embedded URL 'https://ttraff.cc/wb?keyword=judaism%20history%20pdf' is the primary indicator of malicious intent, likely serving as a lure to a phishing page or a download site for further malicious payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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/wb?keyword=judaism%20history%20pdf
    • http://files.holsworth.net/uploads/1/3/1/3/131384674/vudaxanuruvo_zozifovakuk.pdf
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdf
    • http://files.blackrivertraders.com/uploads/1/3/0/8/130874386/6843581.pdf
    • http://files.businessbcs.com/uploads/1/3/2/7/132740343/e9c81eaa854.pdf
    • http://files.electricimpulsecloggers.com/uploads/1/3/2/7/132710782/1430893.pdf
    • http://files.flatspokecycles.com/uploads/1/3/1/4/131408529/6549756.pdf
    • http://files.basstabernaclecme.com/uploads/1/3/1/3/131380158/vunigutenenemaj_juvuwazesenupes_fenulaxirupida_lexavem.pdf
    • http://files.mariemedhair.com/uploads/1/3/1/6/131636946/8d64c6a719871.pdf
    • http://files.westcobbphotoclub.com/uploads/1/3/1/6/131606069/9884853.pdf
    • http://files.vicjuniorxcski.com/uploads/1/3/1/4/131408930/sopon-linobibabalovo.pdf
    • https://nolotigeso.files.wordpress.com/2020/07/22004031758.pdf
    • https://nitapid.files.wordpress.com/2020/07/17615660508.pdf
    • https://valafepow.files.wordpress.com/2020/07/20038462109.pdf
    • https://wanuparuvev.files.wordpress.com/2020/07/jilafaxixudi.pdf
    • https://fosapab.files.wordpress.com/2020/07/fevavetaza.pdf
    • https://xagawimom.files.wordpress.com/2020/06/polipozibomori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025a8b.bin
952b46779d3dd8b4682531a4c01ec75ef08797b84e4d14b547b9b5da3d57042d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25A8B 5000 bytes
font_01_sfnt_off00026b8f.bin
1d7de151152cba6a260f48acbf270f41d42b2c18e6ff60bcba261f694662d7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26B8F 14288 bytes

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