Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c9176cdaaf0508…

MALICIOUS

PDF

38.5 KB Created: 2020-07-09 11:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6b08e1c32e8f37ab030a3c91a172ffa SHA-1: 6ebe405791be2458c1b55cd1029190284bf6dfe3 SHA-256: 56c9176cdaaf0508d9e3f1f7184c470b3021723b6f61065afdd67ed4c0841d46
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to lure users or improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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/pify?keyword=james+w+nilsson+electric+circuits+pdf
    • http://files.cflhfes.com/uploads/1/3/1/4/131407469/kibaxutup-xonaxawa-xurez.pdf
    • http://files.fittingroomligonier.com/uploads/1/3/0/8/130814672/sodumavasoso_sugenufefigu_tinivotosuna_sezomojodupebe.pdf
    • http://files.sterlingsfiberglass.com/uploads/1/3/1/4/131437161/bemadebafegeg-zawokuwofo-rujivowevepitux-zelitaxaxolu.pdf
    • http://files.idaalive.org/uploads/1/3/1/4/131482828/8c1471cfe.pdf
    • http://files.aksimsurgical.co.uk/uploads/1/3/2/6/132682639/7268884ce3.pdf
    • http://files.eleanorandevan.com/uploads/1/3/1/1/131163705/gumuvese-gozul-verobivut.pdf
    • http://files.djjbish.com/uploads/1/3/0/8/130814345/6d02eee64f7.pdf
    • http://files.globalwarming1.com/uploads/1/3/1/4/131406369/xolawez.pdf
    • https://cdn.shop
    • https://koxiwipiledo.files.wordpress.com/2020/06/78067950980.pdf
    • https://bonovujogaj.files.wordpress.com/2020/06/34749274435.pdf
    • https://wixadoj.files.wordpress.com/2020/07/18204820413.pdf
    • https://zalokapupug.files.wordpress.com/2020/06/68340411623.pdf
    • https://runamuked998523811.files.wordpress.com/2020/07/pezavelotadiravereli.pdf
    • https://lavodidanu.files.wordpress.com/2020/07/39475614319.pdf
    • https://dedokufon.files.wordpress.com/2020/06/73215832078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.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_off000059d7.bin
6cd5c0a16595bdb8f2a38ef0bea75d7523df5f25711de159438260a3d7339287
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 5264 bytes
font_01_sfnt_off00006baf.bin
ea100387bf57fee606ed7052a31e2b0392fe5c6672537f3f5ccc2503b9a25588
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAF 9700 bytes