Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b6a1de26b2be56…

MALICIOUS

PDF

39.1 KB Created: 2020-08-03 07:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b84f7e7e836fd17dc5e24eb7c77636c4 SHA-1: 23f9d4dfa5563836ce887382a9f368a2cb6430e0 SHA-256: d4b6a1de26b2be5641a9b8f042912f97c4ed2785ad16ba180372f9f0ac562e87
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=google+weather+icons'. This URL is presented within the document body, suggesting a social engineering lure related to search results. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for 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.com/pify?keyword=google+weather+icons
    • http://files.freedompaws.org/uploads/1/3/2/7/132740415/vigapuron.pdf
    • http://files.engineeringonashoestring.com/uploads/1/3/2/3/132302855/mizulugiwitanobipopo.pdf
    • http://files.vivafitnessshepperton.co.uk/uploads/1/3/1/6/131607075/jemarolozokap.pdf
    • https://fonts.googleapis.com/css?family-Roboto
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/kenmore_500_series_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/garavorusij.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/ludevad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/pizonetepixikifelu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/luropijiwokofukit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4705/9607/files/linukitemipifat.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/lujavejipuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/zadasaxidofonanabekoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/jikoxajozexakuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4888/files/rifodigexo.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_off00004e4a.bin
013bd8a5774e560b8163b00cb173b420219ca297a4d3ab8ddbddf7f6cf39a815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4A 5184 bytes
font_01_sfnt_off00006000.bin
098fde3c2314373a75ba043b855fab3df0142af669ba5e6478d976e9cf43c007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 14544 bytes

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