Malicious PDF — malware analysis report

Static analysis result for SHA-256 545a737bbd0f1319…

MALICIOUS

PDF

36.1 KB Created: 2020-08-22 01:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68ee14d53b044715ab6193a29b93492 SHA-1: 59e2155ed6685a14560ded77e2e1713865ec7f21 SHA-256: 545a737bbd0f131973c7bedb3a1c37c00b7be972005b42066ec6c238ac75e21b
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=sql+server+2019+express'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure the user into clicking through to a malicious destination. No scripts were extracted, but the presence of a malicious redirector and a link farm strongly indicates a phishing or malware delivery attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=sql+server+2019+express
    • http://nemimi.dryer-vent-doctor.com/uploads/1/3/0/8/130874671/1625225.pdf
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/fenogozimifapajujuxibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/naming_cycloalkanes.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/socio_ecological_model_of_health.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/82294758430.pdf
    • https://cdn.shopify.com/s/files/1/0454/7192/4390/files/saparenurupimo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/30349741108.pdf
    • https://cdn.shopify.com/s/files/1/0451/8277/9541/files/jivagonutopuwuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9265/6799/files/24504430982.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/80154575775.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_off00004ff0.bin
1b83f888dc416daee2a311b20f38575f7202ba26b74dfbc6bb9c994aad29dbd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF0 5440 bytes
font_01_sfnt_off00006291.bin
0dc73bef6a37583e933db689e067e9315d67ad8838ba6cf70bf6b0207ad33997		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 9772 bytes

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