Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef1e87ff818f5dc…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 18:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adc02a129d75a801f31fc83e2b289f61 SHA-1: 7dbc7c8a2798b0082dd22ec01b5eb33998a5df34 SHA-256: 3ef1e87ff818f5dccc6f3be57e018a5c05a163800fe8520b2c604dd1ac5003d6
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.link/wix?keyword=corporate+mixer+Ideen, which is likely used to direct users to a malicious site. The document body, though heavily obfuscated, also contains this URL and another link to a PDF on cdn.shopify.com, suggesting a link farm or redirection strategy.

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.link/wix?keyword=corporate+mixer+Ideen
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/grasshopper_616_parts.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/43360005637.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/vakewazowax.pdf
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/simple_present_tense_worksheet_grade_6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://static.usrfiles.com/ugd/74e905_56671ab35ef94cd8968e56219d2b47d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bfe05a77a1b4d5eabd0d05d04a283b4.pdf
    • https://static.usrfiles.com/ugd/b11f6d_27658c80102e43cea722eed829fda0d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c39080e78f604e91ad39f0e2cb8067e0.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/amrutha_spoken_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/govowipurise.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/kezulidisaxukimomadawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/3189905792.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/
    • https://static.usrfiles.com/u

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007240.bin
abf9e1aa67286f56cb4e652d093b751f20f65e4f5a4481f26e25825e043fa283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7240 4900 bytes
font_01_sfnt_off000082d3.bin
406392f65a975131687799a17d0af673c187c67069b85f88246ce9c41236a50f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 9868 bytes

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