Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9793b9fbbcd7c3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 06:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4be8a3209552223529ae0765a975ee6b SHA-1: ec38a3ddc9e7cb7dc4908f58c6d5955fdc9e8876 SHA-256: 8b9793b9fbbcd7c39b3ba580c430552890c03f2b6463aaf7b048a7e9cf8420c7
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used in SEO spam or phishing campaigns. One of the embedded URLs, 'https://ttraff.cc/wix?keyword=04.10+outline+your+argument', is flagged as a known malicious redirector. The document body contains obfuscated text and references to the same redirector URL, reinforcing the malicious intent.

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/wix?keyword=04.10+outline+your+argument
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/31772046946.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/quotation_template_for_website_design.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/20637916271.pdf
    • https://cdn.shopify.com/s/files/1/0434/4053/7750/files/kewuxedesenorugure.pdf
    • https://static.usrfiles.com/ugd/575363_8027d951416c466e864d036cdb9282eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e5799c3b24f454ea21fd6a461209efb.pdf
    • https://static.usrfiles.com/ugd/fbccce_c7d920d75b7346a1b788a7b884334f45.pdf
    • https://static.usrfiles.com/ugd/739437_eaa69270748745f5822229fa0aa2c9bd.pdf
    • https://static.usrfiles.com/ugd/9cc572_cdb727aa40044901b1f4b50368a152a0.pdf
    • https://static.usrfiles.com/ugd/930050_788836a86fbe46df9819dbb42634a282.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec75b9c330194c92a1bd8620845a11a9.pdf
    • https://static.usrfiles.com/ugd/a48928_6b98cc396f704ddfbe2578a8cc200208.pdf
    • https://static.usrfiles.com/ugd/b8c837_8657dfc8d9494d70855fa76bb9c1a0e7.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_664abc8f64d14eb691b7b96c415b3005.pdf
    • https://static.usrfiles.com/ugd/73cb9e_de6ba16962b44a3e8eaa3219ba64eeb2.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_off000068cf.bin
4b22d4431e0499356c6419c1e36527f5857dce1b3f2c3d686da713db28ea3e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CF 5148 bytes
font_01_sfnt_off00007a4f.bin
86bded9dfba8697dc3f9b3e64305cb023833e8215a5868654f618e2a86c91b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4F 11560 bytes

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