Malicious PDF — malware analysis report

Static analysis result for SHA-256 8388eb06c6a3894c…

MALICIOUS

PDF

51.6 KB Created: 2020-08-19 12:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae8e12a31c25c98b93c3c4237dd3310 SHA-1: 7921149d78a85c54ccf1f2006862022be815a81c SHA-256: 8388eb06c6a3894c5dc3c2f0eaa1ab247adfa706f27ce3c3a3798859ea501e88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The primary malicious URL identified is ttraff.cc, which is used to obscure the final destination. The document body itself is largely unreadable, but the presence of numerous external links suggests a link farm or redirection attempt to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=d%25C3%25A9finition+de+l%2527+algorithme+informatique+pdf
    • http://files.kercon.ie/uploads/1/3/1/3/131382470/5412917.pdf
    • http://files.brendargarcia.com/uploads/1/3/1/1/131164351/sodoxo-kifaleb-vakebikote.pdf
    • http://nogafaki.obafemio.com/uploads/1/3/1/6/131607163/fawoduvaxajo.pdf
    • http://pipasuj.calicraftcocktails.com/uploads/1/3/0/7/130738971/dajikesitekenuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/13158691988.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/10465153086.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/95446690828.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/chiari_malformation_surgery_icd_10_pcs.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/sizejimenuzetu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/kusesafi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/41633808946.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/pugiwonolizafufajawoxib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/78700772400.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/38901984387.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d85.bin
4be1f046066af84e9e6b58eb6bb226737f68847c1ab73a381bf43a83370b978b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D85 5580 bytes
font_01_sfnt_off00008015.bin
3411727797253196baac2a60252a5694e6f93b8af2daf48724041c670fdb7c71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 12208 bytes
font_02_sfnt_off0000a6a4.bin
d8308cdf621acf2d300c9fbbcd4232698941a80fd323083b7d4d08f7811fc37f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A4 16912 bytes

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