Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c7163ed017771b…

MALICIOUS

PDF

69.9 KB Created: 2020-08-16 17:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82d7c247c758af5641be2d1a6ea1dc52 SHA-1: d3cac40f10af3b855e5637342f41fa6f2f9561f7 SHA-256: 91c7163ed017771b02b648b62e9054eb46e7187d63b5acf43bb840b1cf6dd298
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=encounter+movie+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains fragments that suggest a lure related to 'encounter movie free', aligning with the malicious redirector's keyword. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a link to known malicious infrastructure, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, typical of SEO poisoning or link farming tactics used to distribute malware.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=encounter+movie+free
    • http://jutefaluj.rosannadiggs.com/uploads/1/3/1/0/131069839/edb5217c.pdf
    • http://files.faithbaptistkirksville.org/uploads/1/3/0/8/130874620/zezokizu_xebizuremafa_retumek.pdf
    • http://wulakeri.foundershollow.org/uploads/1/3/0/9/130970009/timujap.pdf
    • http://files.wasatchguitar.com/uploads/1/3/1/6/131637606/0e56d.pdf
    • http://pigomo.artfulcatholic.net/uploads/1/3/0/8/130873995/gojuvopix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/adh_and_aldosterone_perform_opposite_functions.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/arqueologia_forense.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/74257612106.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/derakokixabomefej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0431/3605/7501/files/butterworth_high_pass_filter.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/80029435880.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/negritude_movement.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/kaththi_bgm_ringtones.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/perfect_answer_of_tell_me_about_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/tugur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/femonaragitug.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/cyber_monday_2016_iphone_7.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_off0000d990.bin
ccc60c418896644b3c021a864290a0893323638f1e6311e265f00dfebe5a0522
pdf-font-stream PDF embedded font (sfnt) at offset 0xD990 4624 bytes
font_01_sfnt_off0000e93c.bin
07f21e1c323c7f5f7863bdce653c4c2f5bc0e6743dcc1f82346a4dd803c23289
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 9732 bytes