Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad970f311d88a8b5…

MALICIOUS

PDF

35.6 KB Created: 2020-08-29 11:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9869414cbbff78ff66effcff8beb5bf7 SHA-1: 5db5a43b2c825f4f22b99bfeffd648d578b793aa SHA-256: ad970f311d88a8b5553c2a8f269e3a25cec7d707f4711384063a4dd32101d30b
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to benign Shopify domains, suggesting an SEO link farm strategy. One critical heuristic identified a link to a known malicious redirector at ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the malicious URL and references a 'software update' lure, reinforcing the attack pattern.

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/wix?keyword=toyota+gracenote+software+update
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/pandoc_markdown_to_slides.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/guzowuwaperesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/83024351929.pdf
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/zom_b.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/55835189573.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/3128238294.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5a826628a64471b41223e00df66196.pdf
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/83747308881.pdf
    • https://cdn.shopify.com/s/files/1/0457/3724/6876/files/kemapepibifurosa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/17106991729.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/15763673909.pdf
    • https://cdn.shopify.com/s/files/1/0437/1031/6694/files/buku_tafsir_mimpi_4d_terlengkap.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_off00004bcd.bin
8cf03d58570453558a95eb847ce6d5a6fe46ba362dfd4a480fd98305be91a423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCD 5436 bytes
font_01_sfnt_off00005e70.bin
44fe980d0d87fd03b8117526fbc65d31ada3bf94b314f9aa9c05e421804cafb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70 10356 bytes

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