Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d82fa5b9a876c1…

MALICIOUS

PDF

48.7 KB Created: 2020-08-18 23:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6397e9b0af5fe1784c7a05341889b80 SHA-1: d9782fd49167f5ba0a77c2ac019974ab39f419a6 SHA-256: e4d82fa5b9a876c19da178f2313f4afd4d2f5488f1dabc98b251dcaa9ae96be6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.com/pify?keyword=sony+bravia+android+tv+49', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's a key component of the attack. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=sony+bravia+android+tv+49
    • http://tikivuto.financialsteps.org/uploads/1/3/0/7/130776262/db95eb7437d8d.pdf
    • http://files.protoshape.co.uk/uploads/1/3/0/9/130969577/gisuvakokuz.pdf
    • https://cdn.shopify.com/s/files/1/0451/6475/7146/files/2828601398.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/52768596915.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/kalender_2020_365.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/26043402453.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/wududimu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/outback_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/layers_of_earth_s_atmosphere_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/malinconia_bellini.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/sopedosasirusoxejuganisi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4587/files/84535572722.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/depression_quiz.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_off0000787f.bin
733b9d52c1977d6d626cbf14a2bfbf7d75b54b2a12a058a8f184120fa0566797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 5260 bytes
font_01_sfnt_off00008a73.bin
08f62bc62a5aee26f5d03b0d2f5132816b4ad36f2c7dd31e0f35d94a349a906a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 14012 bytes

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