Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd3307dd49c0f43…

MALICIOUS

PDF

48.6 KB Created: 2020-08-16 22:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e32acf2d44b699894e75e165f621732 SHA-1: 3bffc39c2aaf23a3b3c09157a8dd9199a2adffdd SHA-256: fdd3307dd49c0f435c08162610f1b978a8f73f49d7b21cae6e654eaa36cd2b9d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'dental anomalies in children' and mentions 'wkhtmltopdf', indicating it's likely a generated document. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=anomalias+dentarias+en+ni%25C3%25B1os+pdf
    • http://files.ps195magnet.org/uploads/1/3/0/7/130739027/70851e18.pdf
    • http://files.planoeastbasketball.net/uploads/1/3/1/4/131453615/ziparewow.pdf
    • http://files.scharencycles.com/uploads/1/3/0/7/130776118/ginukaxezunat.pdf
    • http://napujazil.mindbusterstrivia.com/uploads/1/3/1/4/131438437/f868f8c92b84ffc.pdf
    • http://napujazil.mindbusterstrivia.com/uploads/1/3/1
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/69281836798.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/vovagetuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/ritirekete.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/sanyo_air_conditioner.pdf
    • https://cdn.shopify.com/s/files/1/0448/2406/8258/files/biblical_hebrew_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/wodapubavofakololutof.pdf
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/android_automotive_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/54660806232.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/406384438.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/81575934407.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_off00007ad7.bin
686f310ffc1ca9034e6255680ccebdc2e44a1c21c7c4d1457a91e3466756c217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD7 5388 bytes
font_01_sfnt_off00008cc0.bin
9c12411316ea484267829450c480defb4d1baac145bf5a7cfd5a9f0244bf14c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 11824 bytes

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