Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62521fbf1096eb7…

MALICIOUS

PDF

47.4 KB Created: 2020-09-01 08:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80f50101cd185b7064e90e606768dc88 SHA-1: 312ffdc7ff3346b42bb3c56d0099f77d6779dbf9 SHA-256: b62521fbf1096eb7560a3060adaa79383673621a61c65e39f96c8af1035cf3c5
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The presence of a 'download button' heuristic further supports the lure to click the malicious URL. The primary malicious URL is https://ttraff.cc/wix?keyword=nc+court+system+webquest+answers, which is likely used to redirect the user to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=nc+court+system+webquest+answers
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botudurodakokebavexosox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/33055037298.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/47628141487.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/sarine_tech_analyst_report.pdf
    • https://cdn.shopify.com/s/files/1/0465/5418/5878/files/60631241539.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/raziwumepod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/supofikukufiwanal.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/80474445957.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/english_grammar_test_for_intermediate_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/48166166860.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/66059867637.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/capitalization_worksheets_6th_grade.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_off00006dbe.bin
2173128504e2c0adb519037920a88afb0e3e6815a74612f65cffa5152334e55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 5176 bytes
font_01_sfnt_off00007f53.bin
77ff4343357ac0bd63a0dface6a2f6677b3abba08c01eee233044b87fb212ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F53 10412 bytes
font_02_sfnt_off0000a2a9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A9 4324 bytes