Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26c5c733d4b3ce6…

MALICIOUS

PDF

40.0 KB Created: 2020-09-06 02:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4183604d5648e5fc1fcb1f9bdf0bc334 SHA-1: b0e92e055599a2a60fe2e8f1e8329ea1d1548fc4 SHA-256: a26c5c733d4b3ce6fa3ffe67f275fd8314aa6f7d8c2ffd92ddc226e617ac1ccc
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.me/wix?keyword=chirutha+audio+songs+telugu+lo+ing'. Another critical heuristic highlights a PDF link farm with 28 external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The document body contains garbled text but also includes the primary malicious URL and several benign-looking Shopify URLs.

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.me/wix?keyword=chirutha+audio+songs+telugu+lo+ing
    • https://static.usrfiles.com/ugd/5a4c69_85a5bb146a71407fa27112739722a76d.pdf
    • https://static.usrfiles.com/ugd/808d8c_a0bfdcd09b5d44a0a24a111a63394d5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_62918db86f814b9ab2c56ab61585f3c0.pdf
    • https://static.usrfiles.com/ugd/e49726_6109a03c14a84892b7e30ceb6764eb10.pdf
    • https://static.usrfiles.com/ugd/bd1fc0_8c0b8d1ffa8d488888682b473841e39e.pdf
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/tibus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/counter_strike_portable_download_map.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/air_supply_album_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/gexujog.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/sazitofozadaxaduvedazav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/wozaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/pobidozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/performance_appraisal_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/xadux.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_off0000560d.bin
2c88ce8f8912c4a4f3124a8d2b9a0d51230f59e85e8c8fb391d7a72e912d0b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560D 4992 bytes
font_01_sfnt_off000066f4.bin
c3901e5e805a762f0ac7cdbd4fedcb0b01326ee6387adc40029b2a5cfd1a8214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 14436 bytes

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