Malicious PDF — malware analysis report

Static analysis result for SHA-256 efadbc5e14177ae8…

MALICIOUS

PDF

47.8 KB Created: 2020-08-11 19:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0e270d7dd3e3cadd7cd69ad69cf2ea3 SHA-1: bcaaa57738d61de4395ac4751d9fca2ff2d41b0a SHA-256: efadbc5e14177ae80b751924f014f7978f5d9d942854726a48620e8965415f4a
150 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. One of these links, 'https://ttraff.cc/pify?keyword=le+guide+pour+devenir+bilingue+en+anglais+pdf', is identified as a malicious redirector. The document body, though partially corrupted, includes the same title as the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent to redirect the user.

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.cc/pify?keyword=le+guide+pour+devenir+bilingue+en+anglais+pdf
    • http://wovidebu.homegrownpillows.com/uploads/1/3/0/7/130738993/xepuposud-pagadozadima-daramajun-gidadusunugizid.pdf
    • http://files.mediagearpro.com/uploads/1/3/0/7/130739393/zogawosa_jutuwi.pdf
    • http://files.mkrgenealogy.com/uploads/1/3/0/7/130776386/2845612.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/vonunijalogosumekogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/69595219635.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/28889537637.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/67637340902.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/pudumogukekotifokolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/33175706212.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/58268320170.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/karovowajudisogipakuluw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/zilajatugilube.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jufozigazagapuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/90258037695.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_off000078f4.bin
7ed22cbe11d53f7cec9925637b61682d113989dab219ea1c4be8b7c88c426904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 5352 bytes
font_01_sfnt_off00008b38.bin
51dfd0e489024f349cc5cc5da5ad274849305d3f04e25ba6d19cba5ec85571d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B38 11936 bytes

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