Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbb374c28fd17fc…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 02:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 913e19c944feeaa82079e252d42d72d3 SHA-1: fb8160b0b9a392fe7751ad2c15b5f35b2b5e7109 SHA-256: 3dbb374c28fd17fcf646af8ae31cc712054019278c54cecd69a636231aba095f
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains text suggesting it is a chemistry textbook, likely a lure to encourage clicks. The presence of numerous other PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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.com/wix?keyword=livre+de+chimie+atomistique+pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/2d_and_3d_shapes_worksheet_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/mc_caverinha_tipo_gta.pdf
    • https://cdn.shopify.com/s/files/1/0454/5937/4230/files/laxeledefamopemegoxuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/30750686660.pdf
    • https://cdn.shopify.com/s/files/1/0463/0803/2669/files/corrugated_box_sheet_manufacturers_in_mumbai.pdf
    • https://cdn.shopify.com/s/files/1/0439/9559/4910/files/zekili.pdf
    • https://static.usrfiles.com/ugd/b972d5_335c12e4375e4d608227c9662df6ff51.pdf
    • https://static.usrfiles.com/ugd/e33828_90d08bf96e0842f19d9da83324cb3139.pdf
    • https://static.usrfiles.com/ugd/d01287_7106de6f0618440b8944377121412a2c.pdf
    • https://static.usrfiles.com/ugd/735189_3c5630dc8ff643cc83cdd55a8ba4490e.pdf
    • https://static.usrfiles.com/ugd/01e791_f5ab8c6904604bafa39a0eca4b1c0bbc.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_7462bd92f3384e3bbbaa40a2533e678c.pdf
    • https://static.usrfiles.com/ugd/5ed537_af3956285ac641f2bc0d35bbff6c2b44.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_off000059ab.bin
60804bdb02010fc6f0b5702b7c284711a8a05c6fa92eaefe9bc2828dec26ac36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 5488 bytes
font_01_sfnt_off00006c2f.bin
4c7e2d1934f162828c9adc7d81e830daca0860fe01127b2e4352ced4cbf32a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2F 11232 bytes

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