Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3690532babcd50…

MALICIOUS

PDF

43.8 KB Created: 2020-08-06 10:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86216d2b3fb06b80bc2ca87545f0e49d SHA-1: b485fba7ace840ab36209e023909f6356db7a383 SHA-256: 9e3690532babcd50902e5a021c4284dc5fa71cffc3055b2d936b1bc3edc0469a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same URL, reinforcing its role in the attack. No scripts were extracted from this sample.

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=fourth+universal+definition+of+myocardial+infarction+2020+pdf
    • http://files.sarahsaesthetics.com/uploads/1/3/0/9/130969370/vinizu-nozibat-jukitawufoxene-gamifug.pdf
    • http://nudusi.en.natuurvakantiedenemarken.nl/uploads/1/3/0/7/130738779/2a06591a0.pdf
    • http://files.awyeahcomics.com/uploads/1/3/0/7/130775231/7dc6cb6.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/rutikojubujed.pdf
    • https://cdn.shopify.com/s/files/1/0435/3350/0565/files/38132758176.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/lorakikowifufofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/download_the_notebook.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1904/files/65076768367.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/how_to_use__renderitem.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/cell_and_molecular_biology_concepts_and_experiments_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/lafitujaruzevadiwalorux.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/tupesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6984/9246/files/jobaxidexabasopoduwunow.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_off00006a08.bin
3a9313ac7bfc9662e1e8da3907ef53c88bb2438aa4fa279a6acdd46bfd024bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 5788 bytes
font_01_sfnt_off00007d9e.bin
f965c518e7cb87858528a4b965a673fe04e90ffd7333bad98c5a07c6c1005ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9E 10628 bytes

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