Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b37367a4a96b44…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 09:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f248f80017bfbcbab5342fe3c72133f SHA-1: de9806434de4d8903f2a30530ac9939933c82dd8 SHA-256: f1b37367a4a96b44670d7327dbb50675cc6e887943a284a6f346f1a53ce74c73
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a phishing or redirection attack. The document body, though heavily obfuscated, contains text related to 'plant parts and functions worksheet pdf', indicating a lure to disguise the malicious intent. The presence of multiple unknown URLs further supports the malicious nature of the document.

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.cc/wb?keyword=plant%20parts%20and%20functions%20worksheet%20pdf
    • http://files.myactiverestoration.com/uploads/1/3/0/7/130738723/majalonasiligi.pdf
    • http://kodapaxug.acsoverheaddoors.com/uploads/1/3/1/8/131856161/33807f.pdf
    • http://files.airprogerogia.com/uploads/1/3/0/9/130969475/zebusidejov-fawugaziwuna-fegop-juzok.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/wuvapubevijinubagavubox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/teserirurinofajuvag.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/mobivupilosafalagusux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/dolim.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/sokimagene.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/11514403379.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/15480879893.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/20613736917.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/minecraft_one_person_sleep_command.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/33572292765.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/20707758625.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_off0000622a.bin
2e9d042ea42eeae2b22b5de04087eaef717099c6e89c90986977e953ede013cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 5400 bytes
font_01_sfnt_off00007497.bin
db9b9b346ab3ecd83868d23a8f1496bf938c16d34bc18c22f59735ef7d441e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 10276 bytes

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