Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9ed190c84e298f…

MALICIOUS

PDF

48.6 KB Created: 2020-08-04 23:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b998600ea49304349119050cb2405610 SHA-1: 2e0a673d9e6d5df2401a281583b401e2b1c276bc SHA-256: af9ed190c84e298fa70c5b5b15d9402d93e30f9f2ff61f07e22d525dbd93adb0
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ignatius+catholic+study+bible+pdf+download', suggesting a lure to download a Bible PDF which likely leads to further malicious content. 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=ignatius+catholic+study+bible+pdf+download
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdf
    • http://files.gordongreggphotography.com/uploads/1/3/1/4/131437106/jofon_mubodudagowo.pdf
    • http://files.cwym-music.com/uploads/1/3/1/3/131380063/5b803a7.pdf
    • http://files.friendsofelycemetery.co.uk/uploads/1/3/1/4/131453934/xewulabomuwat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/61735634540.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/4094675318.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/fapolazup.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/1800223776.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/35797259703.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/33741838472.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/rubudojupazulipijovokov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/52171857830.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/nuwaworugugebukufox.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/67047943485.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/47044527213.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0695/files/26529281968.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_off00007ea3.bin
41144b68cbf2d74d59e33f09c2969484a283e6f5b65313279fa4fcd52cf9be33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA3 5592 bytes
font_01_sfnt_off000091be.bin
22986026f1b411cce52d05b5cb1ce63d5da4fd16c9b328ed372aaeb849329123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BE 10412 bytes

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