Malicious PDF — malware analysis report

Static analysis result for SHA-256 590960ff31a2db5e…

MALICIOUS

PDF

32.8 KB Created: 2020-08-04 04:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b406350eb9b732fa29f2d12de7970f0 SHA-1: 0dd3855fb2edc878e9ac18b281b63484bc35a77e SHA-256: 590960ff31a2db5e5c114e4c4a90c933c8d4ec5184875300a77fe9a4a0ec30db
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=audition+la+la+land+piano+pdf`. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on `cdn.shopify.com`. The document body, though heavily obfuscated, contains the same malicious redirector URL and several benign-looking PDF links, suggesting a lure to external content. The ML classifier strongly indicates maliciousness.

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=audition+la+la+land+piano+pdf
    • http://files.micahchristian.org/uploads/1/3/0/7/130739227/bc874ba4db2c1.pdf
    • http://files.mylittledoc.com/uploads/1/3/0/7/130775701/wofugeximizekum-wuwunofedetov-xofakoji.pdf
    • http://judipa.elisabethmartorell.com/uploads/1/3/1/8/131856185/3519229.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/givezajenipopemujukog.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/rifugeraxukavusubilixomak.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/xuxazebezozel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/dugexirabi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/roxopigemisinugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/44597134027.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/1755074050.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/88410115431.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/66607979710.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0215/files/kugozurodewuwopeneji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.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_off000044b2.bin
6e1335d31b03e76eb577fd71a68d7804ba3cc38b4ba4a4eea358db145b26d13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44B2 4748 bytes
font_01_sfnt_off000054f0.bin
c9fc85eb1acd85c9054601f5807cc4a42df5fa5ff947f2ef85bc800059373196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54F0 9928 bytes

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