Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1bbc12753a6df46…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 05:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b8a70433cc610c26482800c9089ede2 SHA-1: e56b781dd468229a5ef3fa2d9ccd5c055dc8f31d SHA-256: a1bbc12753a6df4665a245798c25b1ea0bbf8c8088072db72b2504fb4c3f0788
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a redirector service, indicating a link farm designed to drive traffic to malicious sites. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=guide+to+girlfriends+divorce+season'. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on static.usrfiles.com, suggesting a lure to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=guide+to+girlfriends+divorce+season
    • https://static.usrfiles.com/ugd/b77b08_a904bf9fdb6d4b72aecd40d8cadffd02.pdf
    • https://static.usrfiles.com/ugd/b8c837_63922fa31b41428287cf2be7e624960d.pdf
    • https://static.usrfiles.com/ugd/cd79e3_99776dba7b294823a729bdaa2482b6ad.pdf
    • https://static.usrfiles.com/ugd/4c1554_3cc49583ef1e46e5842e5d7c99bc43af.pdf
    • https://static.usrfiles.com/ugd/b8c837_83b9462286874da28ee99fd604e281d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cbcd5cb10574ca2ac8613995d8126b2.pdf
    • https://static.usrfiles.com/ugd/a771bd_df28e5310aba4a4c967feeec2d566953.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54a9d3abc9d49a990bfec7a8d823e08.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c129ede45344c8f9c428e1332799957.pdf
    • https://static.usrfiles.com/ugd/b8c837_653b4965d3fb433f8d4c65a45cf23aa2.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/dapulinijivebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1167/files/business_case_analysis_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/45557161775.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/84999623476.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_off0000661b.bin
adbc90e4a5d5f89630b834105dbb02e376be12c0bcd6fb18ac572df16096467c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 5280 bytes
font_01_sfnt_off0000782f.bin
7ee204b2c7932f64f9e60f557819e62d1bc5fb96bccda2c55c3a1e20b34c03dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782F 9772 bytes

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