Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5934b862230a19…

MALICIOUS

PDF

116.1 KB Created: 2020-08-03 07:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1c93a7153e81deba2c3eb6a7f6f50a5 SHA-1: 4e6766fb5d41b495dfd8d60ad4983d19aebcc9e0 SHA-256: 4a5934b862230a19e0f2ac7c0fd4fed13eca93065637d236cdb43336c9e00251
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL "https://ttraff.ru/pify?keyword=tin+tin+pdf", which is likely intended to redirect the user to a malicious site. The PDF also contains a mass external PDF link farm, with the first URL being "https://cdn.shopify.com/s/files/1/0432/7853/2758/files/widobonikutolix.pdf".

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=tin+tin+pdf
    • http://files.lidgettandbeyond.org/uploads/1/3/1/3/131398134/rodenak_jugagisedopujon_banere.pdf
    • http://files.austriangallery.com/uploads/1/3/1/0/131070940/pixutujufukid.pdf
    • http://files.netarrant.org/uploads/1/3/1/6/131637498/lidorajasozitum.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/widobonikutolix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/pixiwuvimuvuritolufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/berabafakawidemewegofowox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/2551600757.pdf
    • https://cdn.shopify.com/s/files/1/0430/0950/7487/files/motejitexisoguwox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/how_to_reset_ducky_one_2_mini.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/lutorajuvuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/xslt_xml_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4396/files/jevizamugokobigogiraloj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/56194018032.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/kupibekonevamokako.pdf
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/jiwamaxibukilugime.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/jorubuku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/5_elements_of_effective_thinking.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a88.bin
c1e515019e86728551b6d6fc478ff3fe7c96a04be86de5e4669ba5f1467067a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A88 4468 bytes
font_01_sfnt_off000189d4.bin
cd34bf60cdff693a230e94d4367d3b86f588ea57f001d5030172d1a73d3f4f1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x189D4 10656 bytes
font_02_sfnt_off0001ae3b.bin
5270200427a35280080ba2059bb53a7fe71851b5f9466b21cdc3f528a17ee36e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE3B 16100 bytes