Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f7ab74b1ad5072…

MALICIOUS

PDF

45.7 KB Created: 2020-08-01 15:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c16ef42300a29f39e9f7dda4a6cd1a SHA-1: 1fc86110f57f6ed9e073a078fc33dd687ab746e7 SHA-256: a7f7ab74b1ad5072d6407690a948f11dd3ae918e08045f50a2c55760ea540b6e
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=carrier+scac+code+list. This indicates a phishing or scam attempt to redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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=carrier+scac+code+list
    • http://files.ayoga.eu/uploads/1/3/0/8/130814432/tolavok_tosaloxur_kifovej_vopizipatoralu.pdf
    • http://files.academictranscripts.com.au/uploads/1/3/0/7/130740625/tafefuf.pdf
    • http://files.wyndlestrawdesigns.com/uploads/1/3/2/7/132740905/kuxin.pdf
    • http://files.vomorenburg.com/uploads/1/3/1/1/131164431/5580987.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/nekonudotuvurabovuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/xadotun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/65323627547.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/gavef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/6938233420.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/bolabijamumizogubek.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/bulifagonidukadav.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3654/files/23772367637.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/18976387927.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6951/files/21657745124.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/kagaverokikot.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_off000068a3.bin
7423a0ebe804bfafdd0a5cb0f26a7a23c58fb3d4e600a3b27c38c0b1296b4f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 4836 bytes
font_01_sfnt_off0000791c.bin
006b95d107924fd7beb63bba88f400df76cddd4007eaa31781a2f476fec6a595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791C 15292 bytes

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