Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc05cded635bae8…

MALICIOUS

PDF

38.7 KB Created: 2020-08-14 07:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb54a9a18b718d1699dbdc3ee9dd3c4f SHA-1: 35703a8166530a8392b90cab302681fe401ee9c8 SHA-256: 9dc05cded635bae8d0d65e1d56683816a41602bb797d7f3ddf438a3937abc792
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises movie subtitles but is known to lead to malicious infrastructure. The document body also contains this URL, reinforcing the lure. The presence of a PDF link farm heuristic suggests the document is designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=minions+full+movie+with+english+subtitles
    • http://files.lincolncollegechapelchoir.com/uploads/1/3/1/6/131636947/wevox.pdf
    • http://ginopaf.livingbalancedesigns.com.au/uploads/1/3/0/8/130814328/b3207ed0a220ea2.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/58729962101.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/57925692014.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/sibunosuruvijulazukan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/smith_s_bible_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/clep_official_study_guide_2014.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/surprise_arizona_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/10612289353.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/dozuzozuwevew.pdf
    • https://cdn.shopify.com/s/files/1/0438/7209/2315/files/16871127775.pdf
    • https://cdn.shopify.com/s/files/1/0429/5409/6806/files/fakopukagogirekakef.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/mivuzosolirebexewogewode.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_off000058fc.bin
96b9e4197c55b50da134cb6a754eda668c31f6fd625dede8d0d31169cd585ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FC 5172 bytes
font_01_sfnt_off00006a93.bin
ef13c7e9d8af8e4c8aea4fcdc20a50f7257928a30ef870765cfcffab8c0d67f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A93 10364 bytes

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