Malicious PDF — malware analysis report

Static analysis result for SHA-256 d006a5f3a2bf5a5b…

MALICIOUS

PDF

42.4 KB Created: 2020-09-17 21:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bf1c94c75625ebe54253bd6217c6d6b SHA-1: ad660b20c353814a82ae0a2f017fc6d7ab69b8ed SHA-256: d006a5f3a2bf5a5bb7c65b09fa653a7f22ebe4432b53d737de15baab81889101
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, disguised within the document body as a 'film study worksheet answer key'. This link, 'https://ttraff.link/wix?keyword=film+study+worksheet+for+a+work+of+fiction+answer+key', is designed to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many of which are hosted on potentially suspicious domains.

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.link/wix?keyword=film+study+worksheet+for+a+work+of+fiction+answer+key
    • http://files.voherkimer2020.com/uploads/1/3/2/7/132740361/sesamo_vegutetugo.pdf
    • http://zataxobu.openheartyogastudio.com/uploads/1/3/0/7/130740356/bijigogifekelefomix.pdf
    • http://files.antonbarichconsulting.com/uploads/1/3/1/4/131453494/336dcb71.pdf
    • http://files.watertreeboerne.com/uploads/1/3/2/7/132741189/fapobivoxijezu.pdf
    • http://gikomanek.carsontheatre.com/uploads/1/3/1/6/131637136/nowepex_famavomejeseles_fukeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/catechism_of_the_catholic_church_ccc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9762/files/crazy_town_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/7093681136.pdf
    • https://cdn.shopify.com/s/files/1/0438/0318/1218/files/90562607035.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/google_drive_speed.pdf
    • https://cdn.shopify.com/s/files/1/0465/4222/5566/files/bremer_stadtmusikanten_text.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_off0000685a.bin
835794c5d266d57d33f3859fe07761f3e1a3e03a6aa4f6e552364f5800663ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 5476 bytes
font_01_sfnt_off00007ae5.bin
c722222d85c73a1237e0bf96aa93d15d9beeff3a16b664a96ef37112536c2429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE5 9780 bytes

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