Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b7dc065cba5514…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 21:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c24f2bcb4dd23e293b5cd426530563 SHA-1: ff77fc7e23cb7a0be8acbaf6825a1030cbca3caa SHA-256: a2b7dc065cba55146a00a4122ef485e6c5f75b636bbde5b61eee19bacdc70666
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=arupu+song++roll+rida', is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same redirector URL, suggesting the primary purpose is to lure users to malicious infrastructure. The presence of many links, including those hosted on cdn.shopify.com, indicates a potential SEO manipulation or phishing attempt.

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=arupu+song++roll+rida
    • http://ragog.stellarendurance.us/uploads/1/3/1/4/131407995/5671152.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6605/files/invention_of_internet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/66571620184.pdf
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/sedeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/bacterias_gram_positivas_aerobias.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/rokivixezegalobadurivosiv.pdf
    • https://cdn.shopify.com/s/files/1/0441/2892/7896/files/pirisawoteju.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/antonyms_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1321/files/wexizimozo.pdf
    • https://cdn.shopify.com/s/files/1/0451/9470/7095/files/geguzebajebanidez.pdf
    • https://cdn.shopify.com/s/files/1/0447/5600/9111/files/base64_encode_java.pdf
    • https://cdn.shopify.com/s/files/1/0454/6048/8350/files/lubefegenumugigafulenike.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_off00006d84.bin
1ba8a819f4804d870f01290c50f4feeb99df063d6ccfc2fe7faa79cdcd3ecbe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D84 5116 bytes
font_01_sfnt_off00007ef5.bin
c9eb15fcb9112d50cfbae01e8ba7943e7dd389debcfc9629c4c05cb0d27ad9d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF5 15136 bytes

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