Malicious PDF — malware analysis report

Static analysis result for SHA-256 3785d28a01a11778…

MALICIOUS

PDF

41.9 KB Created: 2020-08-05 01:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b7a66051bd4397e6dd9860d4951dad SHA-1: 1490958a5b34457ca8a6fe2f5a58faa76cec31ac SHA-256: 3785d28a01a11778b2e6a6c4e569511eec30c1525296f42bac3d7104d8eff3d4
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, many of which point to a link farm hosted on Shopify. The primary malicious link, https://ttraff.ru/pify?keyword=how+to+speak+fluently+in+english+and+with+confidence+pdf, is identified as a redirector to malicious infrastructure. This suggests the document is designed to drive traffic to potentially harmful sites under the guise of providing educational content.

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=how+to+speak+fluently+in+english+and+with+confidence+pdf
    • http://files.adamphuff.com/uploads/1/3/0/7/130739340/9040918.pdf
    • http://files.michiganlegalmalpracticequestions.com/uploads/1/3/1/4/131453560/3680486.pdf
    • http://files.lifecompletefamilyministries.com/uploads/1/3/0/7/130776277/tirutupadexukidomi.pdf
    • http://vubije.mollymadefibreart.com/uploads/1/3/1/4/131453247/8ceb2045a12b059.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/newisobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/risigumuretowone.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/bidibezuwidaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/fasavugipumugasefogurifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/tajimejujusejologepanap.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/13403851562.pdf
    • https://cdn.shopify.com/s/files/1/0448/4068/1633/files/matrix_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/37879777854.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/vogesoziwabap.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006546.bin
6ebefc769e591d6da8b27f3547e7c0696ce79acc7e1c46d8a4816681b1355d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 5540 bytes
font_01_sfnt_off0000783e.bin
c5862dd1664bb60cecf77e0bf67452f833897107a9b45a2fe28fc69eddc58f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 9936 bytes

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