Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead4f3deef8c7adb…

MALICIOUS

PDF

69.2 KB Created: 2020-08-19 07:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02a62110d7c4444f64fbf5eb45dfed5b SHA-1: 95f66251c56527ae2c16ca06010f00307fc3d158 SHA-256: ead4f3deef8c7adb8089a09698069de67ad7bbb37165536fb7da0c76fd0f0244
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also flagged this PDF with high confidence. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious site.

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.ru/pify?keyword=bootstrap+form-+row+not+working
    • http://files.ourworldofchi.com/uploads/1/3/1/8/131871633/3653864.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/rozofaderanoxomufexixeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/4275/0114/files/delezifegaliserarozaregur.pdf
    • https://cdn.shopify.com/s/files/1/0451/1947/1781/files/catch_and_kill.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/fesaruwowoxazot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/15117128185.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/92144501477.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/60264776310.pdf
    • https://cdn.shopify.com/s/files/1/0451/0393/9737/files/wowedilatifadijopili.pdf
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/tumaximezokitiviwoziteje.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/kptcl_junior_assistant_old_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0429/1333/3411/files/nadikudir.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/bsc_agriculture_entrance_exam_model_question_papers.pdf
    • https://codepen.io/bradrar1/pen/zjGRRZ
    • 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_off0000bfe9.bin
55155458174b6a8289e42d327f6cc4ec7a9a3b3eebe839614ab7d55cf4a2f8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE9 5428 bytes
font_01_sfnt_off0000d270.bin
b44db13a18b4f218a39d30d534c73208bd0c3701752ab89ccd3ba2e9e1e67c1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD270 17308 bytes

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