Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4d7c5d54a4b29a…

MALICIOUS

PDF

47.1 KB Created: 2020-08-23 08:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce50ae45e312be69a95a2fcefc4093c SHA-1: 273267969d9124fa0eeba9793e6979bea1728810 SHA-256: 8e4d7c5d54a4b29aeeddba7fc11bc4248c7a95761cee6281bc032d33f1897c46
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=bengali+astrology+software+for+pc+free'. This URL is presented within the document body as a lure for free astrology software. The PDF also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO poisoning. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=bengali+astrology+software+for+pc+free
    • http://getol.catherinedanielfitness.com/uploads/1/3/0/8/130874388/gexivumodarafagufap.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/zokoba.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/c_friend_class.pdf
    • https://cdn.shopify.com/s/files/1/0431/0859/7927/files/36912495018.pdf
    • https://cdn.shopify.com/s/files/1/0437/4914/6778/files/biblioteca_virtual_gratis_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/business_correspondence_and_report_writing.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/pupowusoz.pdf
    • https://cdn.shopify.com/s/files/1/0465/3472/1694/files/29240996507.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/70898908251.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/71036629530.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005985.bin
2a53e06ca790c9cfe24e4d1d18c431777929f3e10889efa67a94550a5af5080c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5985 5428 bytes
font_01_sfnt_off00006c1e.bin
d5130843386993c36bd131fc6eb7b3c81e0b6eafc572f1de286c978d327630e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 9728 bytes
font_02_sfnt_off00008bf2.bin
38d248aced74cb86c7ed6877f64373941a6a0cbedd2a09134ec4d56c749ce3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF2 10416 bytes

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