Malicious PDF — malware analysis report

Static analysis result for SHA-256 347e724021eaab88…

MALICIOUS

PDF

76.5 KB Created: 2020-07-27 19:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6484a47c2d0e8fd1727f96e02bcbbdaf SHA-1: 8372c6fcbbcb3305c4dc9be01dd734088e7aa4b2 SHA-256: 347e724021eaab88697bb445e0c8b607a0b9898f3d527cd9a2f62e7fd97d9e20
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download for 'Android sdk 28 free'. The document also features a link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine further actions.

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=android+sdk+28+free
    • http://files.challengethewind.org/uploads/1/3/2/6/132695730/4477159.pdf
    • http://files.icomos-sg.org/uploads/1/3/2/7/132710780/65d2c87d75.pdf
    • http://files.elaionasfestival.com/uploads/1/3/1/0/131070481/4412699.pdf
    • http://files.croftandwalker.com/uploads/1/3/1/6/131606115/2088269.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/8236602672.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/70701879466.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/35733386319.pdf
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/77673409673.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/pekobojuwodubufumun.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/tolonozolapaxesot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/woviwipepusine.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/21523779403.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/40047162771.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/gewubavepepuvenaxipexuzux.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/ruzufipitubibode.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/mitalomufapekafoluli.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_off0000e687.bin
01e5fea351e9579901da2cdc4eb6f536e970b613d54abf0eaa2b9d104b142dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE687 4748 bytes
font_01_sfnt_off0000f6a8.bin
22feb6c74361fbe6f1027bdc83de440a33994ac46c94853bd1c62ac0d7c4517c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 14660 bytes

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