Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2788599f9a51cb…

MALICIOUS

PDF

41.2 KB Created: 2020-08-05 13:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c26bbd233d4eb0c4c4e1d35f1d4db949 SHA-1: 30c299edd48cd1ba3767bc676a9fb6a681f0ae39 SHA-256: ad2788599f9a51cbfd2dffc233925b660281c577dfa1d8cff02ea676ee5f3d57
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=geometrical+and+physical+optics+longhurst+pdf+download'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains, likely for SEO manipulation to increase visibility of the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=geometrical+and+physical+optics+longhurst+pdf+download
    • http://files.c-lution.com/uploads/1/3/0/9/130969809/1483957.pdf
    • http://files.ryancmeldrum.com/uploads/1/3/2/6/132696145/jenidofawexoju.pdf
    • http://files.thevillagecorner.net/uploads/1/3/2/7/132710678/rojox_pizobaniru_tepinep.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/nejeseneranisetidulugufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/r134a_pressure_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/beruwef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/83223937412.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/wenolosuxelusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/pipijerase.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/fekizalobejogeros.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/poxaxibidoxuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/bejenedifeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7227/files/fesezezof.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/42903998394.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/katogatufakejuz.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_off0000623d.bin
3964d94aa878529a7f49763c3fb26b12d4c6a4cad5def5c0bbb095e95dcdfe2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623D 5792 bytes
font_01_sfnt_off000075e9.bin
bb4f9de130e1d0bbd9b7f9f67c4bfc8d8c474db9c8b8d3c959e726195dfe5cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E9 9892 bytes

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