Malicious PDF — malware analysis report

Static analysis result for SHA-256 c485c67743d6e533…

MALICIOUS

PDF

39.6 KB Created: 2020-08-17 02:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7894f9e5d18d21652c1de62c254b9af SHA-1: 47203ec0f4acbce80d89e580fd65b85c1e36c200 SHA-256: c485c67743d6e5332a1ba3abc798fef1652b86b17d113f1ac29e3a8ac62b1e1d
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning technique to distribute 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.ru/pify?keyword=us+fed+balance+sheet+normalization
    • http://files.comesailingcharterschicago.com/uploads/1/3/2/7/132710565/9360590.pdf
    • http://files.thealpacacottage.com/uploads/1/3/0/7/130740149/67d484df6.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/how_to_make_italics_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/background_eraser_apk_premium.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9126/files/bleacher_report_app_comments.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/lenubijajimiparujogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/lunuzoxuzasuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7665/files/jejira.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/81129174823.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/70034420298.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/gobiba.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_off00005d51.bin
5ce0bd6e02a6c32bac46790c21bcb4cc363c953fc1918028a4e880137f0d61ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 5440 bytes
font_01_sfnt_off00006fa4.bin
018298ca6f9c2bd74cd9409d962beebf473c5895d097a4022287fd0ceba65729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 10124 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.