Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9069a41c26836e7…

MALICIOUS

PDF

38.7 KB Created: 2020-08-03 17:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b44869939f721715546c6beb951ddd8 SHA-1: f3d0a732eccd55e429390657cd3ebce4583e32c4 SHA-256: b9069a41c26836e74cda22066801fb186fbb3b36b6461ee6eb867b34cb806d96
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 'https://ttraff.cc/pify?keyword=arduino+reference+guide+pdf'. This link is presented within the document body, disguised as a helpful resource. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=arduino+reference+guide+pdf
    • http://files.thriveswpa.org/uploads/1/3/1/0/131071082/zaxagipiwasef-sewisuraveruzin-xefifop-pupojo.pdf
    • http://files.centralillinoisslotseries.com/uploads/1/3/0/8/130874612/zuxewo-kokiwodemosegit-maxoverogin.pdf
    • http://files.taverhamdaycentre.org.uk/uploads/1/3/0/8/130814706/nuwupapadalome_roguxegagisubul_zokalo_sokekovogor.pdf
    • https://cdn.shopify.com/s/files/1/0431/3369/8209/files/bijobuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/96996670056.pdf
    • https://cdn.shopify.com/s/files/1/0440/0037/9038/files/my_imortal_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1723/files/zibabibonixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/lexugonolaxagajoxifixuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/55195319911.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/30855809202.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/malafudarewipik.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/gibbs_1988_learning_by_doing.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/ty_beanie_baby_pricing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/50013875678.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/junasifajedabidevodani.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_off000059c4.bin
e8cf6704b5fc1cb592929ca7e92ad3542973014894820c4aa4d042836bb18314
pdf-font-stream PDF embedded font (sfnt) at offset 0x59C4 4892 bytes
font_01_sfnt_off00006a87.bin
170a88fcd8478e054fe48d7aee8d80483fe73d0ec3d415efb3cf026c379b5a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 10344 bytes