Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0edf5730e53e440…

MALICIOUS

PDF

61.3 KB Created: 2020-08-12 23:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7625f4902cd341c9ae426f086a2d40a2 SHA-1: b762576e747e4a833c89c2a686a8f4220bc09b69 SHA-256: b0edf5730e53e440271ce81651d65dea09e17aaf4b29a7efd9cf859b9f551614
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. Another heuristic indicates the presence of visible command execution instructions, suggesting potential for further malicious activity. The document body itself is heavily obfuscated and contains the malicious redirector URL.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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/wb?keyword=essential%20cordwood%20building%20pdf
    • http://jesof.counselingwithcatherine.com/uploads/1/3/1/3/131381464/zuwidujuzame-kexivasi.pdf
    • http://files.curleybands.org/uploads/1/3/1/6/131637881/cb4491ce2.pdf
    • http://files.glambarbyceline.com/uploads/1/3/2/6/132696104/0fa34a6c45e.pdf
    • http://files.xmastrees.org.uk/uploads/1/3/2/7/132740462/826000.pdf
    • http://files.prairiekate.com/uploads/1/3/2/7/132710780/falure-zaboj-juwideriz-nodijozi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1509/1870/files/61593529165.pdf
    • https://cdn.shopify.com/s/files/1/0433/3646/6590/files/15873039821.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/amarnath_yatra_doctor_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/storytelling_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/duwusurenawetadosoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/3087922047.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/calendar_2020_printable_with_holidays_uk_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0411/6637/files/25114460197.pdf
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/zebuvubugizuvalofib.pdf
    • https://cdn.shopify.com/s/files/1/0440/6516/1366/files/19158679746.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/rational_numbers_worksheets_grade_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a38a.bin
3717f81eb0caf262841f251f6231c41482a497bc366da0385c3ba2569e3166c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA38A 5396 bytes
font_01_sfnt_off0000b5f5.bin
833a0c6f7196dcc681ef78812d52f7b5e54613ea0fd59b8a3a30f4e730a3f786
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F5 10580 bytes
font_02_sfnt_off0000da0f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0F 4324 bytes