Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c64465f911d77c…

MALICIOUS

PDF

32.9 KB Created: 2020-08-11 00:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 767aea07a2fd8cf24ae86f0e24dfa3b3 SHA-1: 1d586840de3292f0a103ed01567ff8c7b8e22108 SHA-256: 41c64465f911d77c74545a73c2459c8b22e33e6c7c6733c556a8967aa34c6f22
120 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 'https://ttraff.com/pify?keyword=bon+voyage+french+2+workbook+pdf'. This indicates the document's primary purpose is to trick users into navigating to a malicious site. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, likely used to obscure the malicious redirector. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.com/pify?keyword=bon+voyage+french+2+workbook+pdf
    • http://jexot.display101.com/uploads/1/3/1/3/131380005/sozimikotufemem_suxabizolepid_funolaseviv_nujuk.pdf
    • http://files.lulalake.org/uploads/1/3/0/7/130775515/8037508.pdf
    • http://jewew.midmichigandogtraining.com/uploads/1/3/1/3/131384771/a3e2d53c2ed3.pdf
    • https://cdn.shopify.com/s/files/1/0447/3107/2666/files/menu_dieta_cetogenica_30_dias.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/billy_elliot_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/27808697679.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/pirate_bays_se.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/58964228890.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/cancer_stem_cells_implications_for_cancer_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/cetoacidosis_diabetica_y_estado_hiperosmolar_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/nidumatebefutuxuru.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/difference_between_id_and_class_in_html.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_off000042c5.bin
358750cee943ae87799abddab85f8b96e2362850127dbbc784464fe410746a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C5 5848 bytes
font_01_sfnt_off000056c4.bin
a99d22bcd93c3c48c2648acb3101073bf8e47aecaef833c4626849c1cef0eee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C4 9564 bytes

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