Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45df23a73bedef9…

MALICIOUS

PDF

40.1 KB Created: 2020-08-02 23:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52c5f93a6e3353aa623c0e851bba37c9 SHA-1: 4bb11a72dad16c7ec4025e02653fb4ed233cae1e SHA-256: f45df23a73bedef9718d0b01c381759d26acd9938538533b0d8b28edd4c32832
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final destination. The document body, though heavily corrupted, contains the same URL, indicating it's the primary lure. The presence of a malicious redirector and the sheer volume of links strongly suggest a malicious intent to drive traffic to potentially harmful sites.

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=matter+and+interactions+4th+edition+pdf+download
    • http://files.camponeway.org/uploads/1/3/2/6/132695813/rubotiwoba_babafawib_vojununanifow.pdf
    • http://files.virginiasar.org/uploads/1/3/0/8/130813778/4e53a41f25f.pdf
    • http://files.blockandboardpdx.com/uploads/1/3/1/4/131437724/biwavovigur-mezojiwex-tagojibiziwezi.pdf
    • http://files.joseluisperezjim.com/uploads/1/3/0/9/130969032/38531b4fdf8.pdf
    • http://files.flaniganssportsworld.com/uploads/1/3/2/6/132696233/mekak_kujanox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/99425887505.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/sumaxabupag.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/2516988346.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/jetinamovomex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/53911943500.pdf
    • https://cdn.shopify.com/s/files/1/0428/1224/4134/files/wizanasizuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/62577218801.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/wobevajezas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/50865421372.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/87241980087.pdf
    • https://cdn.shopify.com/s/files/1/0435/8507/7405/files/meriki.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/62178267992.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_off00005dac.bin
90de92ff9501ef13d9b2c5ead3870df43bb206e94be7682a77054419711cbece
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAC 5428 bytes
font_01_sfnt_off00007046.bin
820c1c699747d22712cc0d00a01e6c1d771698ba6c193856edb4ce6c609a7cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 10324 bytes