Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8ba3388869ff9a…

MALICIOUS

PDF

55.1 KB Created: 2020-07-09 21:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 307568f01287b5c625f1a466ee211499 SHA-1: 5994cb55085403d3d3cd14ff2f073150dcaf8c75 SHA-256: 0e8ba3388869ff9a97b8f39a3afb9e8f8cf6e101d40c6fb98449d6c7a7014570
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link redirects to known malicious infrastructure, suggesting a phishing or malware distribution attempt. The document body, while containing garbled text, also includes the suspicious URL, reinforcing the malicious intent.

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.ru/wb?keyword=stoppard%20rosencrantz%20and%20guildenstern%20are%20dead%20pdf
    • http://files.poteetchoir.com/uploads/1/3/0/7/130776591/karonajebajekexik.pdf
    • http://files.heroicfineartgallery.com/uploads/1/3/1/3/131398542/kizufijoso-turezomejosopot-vorig-tilak.pdf
    • http://files.womenofintuitivewisdom.com/uploads/1/3/1/4/131453299/gufedafoxubujudejow.pdf
    • http://files.twocarpentersconstruction.com/uploads/1/3/0/8/130873895/xuvodobisedozu.pdf
    • http://files.tomdexter.com/uploads/1/3/1/1/131164472/8994202.pdf
    • http://files.cyclonecanvas.com/uploads/1/3/1/1/131163516/1914316.pdf
    • http://files.tarotartist.net/uploads/1/3/2/6/132681938/8280551.pdf
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.pdf
    • http://files.dongshiart.com/uploads/1/3/1/6/131607005/zumuzesuxunol.pdf
    • http://files.atspscecentennial.org/uploads/1/3/2/6/132681758/favewajuwiko.pdf
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nulonexix.files.wordpress.com/2020/06/kewexosijurat.pdf
    • https://bonovujogaj.files.wordpress.com/2020/06/10786460778.pdf
    • https://sefofulevap.files.wordpress.com/2020/06/gebedevazalijofitupe.pdf
    • https://zuporewa.files.wordpress.com/2020/06/malosolipepesiguw.pdf
    • https://sedavamajux.files.wordpress.com/2020/06/norogemevibifejuzafofaf.pdf
    • https://dezixoniwi.files.wordpress.com/2020/07/fupuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.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_off00009883.bin
f3fd13cdb8a5140eca02fbf78174f40cd30ff5fa9e8bca2d9ff9586ce05e88ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9883 5356 bytes
font_01_sfnt_off0000aac8.bin
126ea22c4adfeae7a39a10502eda867a3dc7b0623805880c5bc1a5255be541d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC8 10560 bytes

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