Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6828b1a4177d41f…

MALICIOUS

PDF

70.0 KB Created: 2020-08-15 12:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f2673ddb719bd4a3e9b43a5fe6a9dcc SHA-1: 7368313259b984ca88105b31eee2f7b2c105e6e0 SHA-256: f6828b1a4177d41f3a69ed854c4f2f7fd03f8f1bf149e463a26d7fd1fc8a1d57
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=amphotericin+b+structure', indicating a likely attempt to redirect the user to malicious content. No scripts were extracted from this sample.

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/pify?keyword=amphotericin+b+structure
    • http://rerog.ritzwinterhop.com/uploads/1/3/1/3/131383483/zavur-vedegazorudap-sasatokixu.pdf
    • http://files.lesliemcgeaghhypnosis.com/uploads/1/3/1/4/131453255/5735024.pdf
    • http://files.innisfailtemple.com/uploads/1/3/0/7/130740530/7c6b7bce7fe9.pdf
    • http://files.cthsurgery.com/uploads/1/3/0/7/130739084/guvarulesan.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/fbla_middle_level_competitive_events_study_guides.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/63826753243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9580/files/86723065891.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/blutv_indir_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/cacerola_de_mar.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3169/files/76975443150.pdf
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/list_of_car_makes_and_models_excel.pdf
    • https://cdn.shopify.com/s/files/1/0447/9637/9297/files/calculus_of_several_variables_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/ferevom.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/lazisuvotomixilasur.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_off0000b283.bin
524f1025c23326edc5bada76fef7d788be6d138762ce011f1702d862e3df08bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB283 5060 bytes
font_01_sfnt_off0000c38f.bin
2d1e01b57cef62d6470cb75ca50088a680ff0e794be21062c8010d328df73ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC38F 15812 bytes
font_02_sfnt_off0000f57c.bin
f80b9f84d6ea16074f67da7a904ab41e14e5a44612b81a97f195d72f9bd2a496		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 16160 bytes

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