Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a38a3f83064d86…

MALICIOUS

PDF

53.3 KB Created: 2020-09-02 19:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9574a25a3f9491ebc8447ce3cbfc175e SHA-1: 5c8de395676eaed7b76d8da8d31fe8d4f6a02e30 SHA-256: b9a38a3f83064d869b5f48c3959e30c8b5c2c05b73df29731bf990314c3c342c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=team+dinner+invitation+email+template'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm or redirection strategy. The primary intent appears to be directing the user to malicious infrastructure under the guise of a benign 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.link/wix?keyword=team+dinner+invitation+email+template
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/69095004975.pdf
    • https://cdn.shopify.com/s/files/1/0434/7363/3432/files/96049668487.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/jadefazowilixoxabozok.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5589/files/math_101_kfupm.pdf
    • https://static.usrfiles.com/ugd/4b7290_b0866882b9814a3e8c87d806b1627265.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_abccee8de67c4bd68c7a3ed64120e21f.pdf
    • https://static.usrfiles.com/ugd/8a419d_b3da7052e5a44762a44d653594fd3712.pdf
    • https://static.usrfiles.com/ugd/50de67_2a03eed053614fe6a7794044427f0852.pdf
    • https://static.usrfiles.com/ugd/fa6f14_ffc99d3b2c9b4dad8ac27a3adf60e5b6.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/vefalokepefamoxamijozago.pdf
    • https://cdn.shopify.com/s/files/1/0457/7997/6358/files/dopedakedanobidaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdf
    • https://cdn.shopify.com/s/files/1/0437/6838/1591/files/28618401728.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/phd_thesis_evaluation_report_sample.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f19fccfaa3946ce9e5e591fb39577f8.pdf
    • https://static.usrfiles.com/ugd/529385_7f09a935db70421bb9eeb9125ed53c96.pdf
    • https://static.usrfiles.com/ugd/b8c837_9171afc45e8b4b4cacd8a07933505dd2.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_off000086f8.bin
2c6760359e8bb51a92d3623d17b15d476410c05e2b45acfedf7c10e5ecb6e0ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x86F8 4724 bytes
font_01_sfnt_off000096e7.bin
47cd6b5c12e0a5a69b91d7b5e12c31d4c6b19ad9439cc4b3119cb1fde66c8646
pdf-font-stream PDF embedded font (sfnt) at offset 0x96E7 10256 bytes
font_02_sfnt_off0000b9ef.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EF 4324 bytes