Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cddb0d474062f0…

MALICIOUS

PDF

50.8 KB Created: 2020-07-23 12:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf9580073d109cb177edb4e2f554498 SHA-1: 703b33092054d695ebdc12fac2e14b6a2085b03b SHA-256: e1cddb0d474062f0b47f5846c335cf6b6437e56957cc16306cfdbdfc0619b925
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary heuristic indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to the 'Sacks sentence completion test', suggesting a lure. The presence of a link farm points towards an attempt to distribute malicious content or phish users.

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.ru/pify?keyword=sacks+sentence+completion+test+answer
    • http://files.thedropuk.co.uk/uploads/1/3/1/4/131453255/bb2a00131453.pdf
    • http://files.critgeoed.com/uploads/1/3/2/6/132682563/3b8d9fe7ad4b17.pdf
    • http://files.creative-change-management-online.com/uploads/1/3/2/6/132681438/bolexapedituxi.pdf
    • http://files.canajoharielibrary.org/uploads/1/3/0/9/130969865/dozutinejigut-fobegadefi-wasakovizuper-meguxufife.pdf
    • http://files.critgeoed.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/dutaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/28684575880.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5637/files/xisawuxiselexokiwazeneb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/94274925827.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/lusasabobisuzajiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/libokuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/73652911500.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/36002063750.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/67978789773.pdf
    • https://cdn.shopify.com/s/files/1/0433/6330/3575/files/xewetebupikitapirir.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_off00008028.bin
eace26a15a9708203e60ab7df5e341e3b7411ac2c7320c611f6910adf7e7da89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 2168 bytes
font_01_sfnt_off00008a00.bin
05106c6a908dc47318836f1fe5ed1da2954f1a0b2fee10199b30fc59d65f8858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A00 5124 bytes
font_02_sfnt_off00009b52.bin
6217274d7a5486dd60477f852f6bf9736d43a6d38e1eebf14693fef933566e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B52 10116 bytes

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