Malicious PDF — malware analysis report

Static analysis result for SHA-256 520cef1bcbaa9d48…

MALICIOUS

PDF

47.2 KB Created: 2020-08-21 14:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02e11e6b1030698926f3f3d435b2b901 SHA-1: 5abc02f95c6e3f0b5a1b765b19ec6e9574d3bd9d SHA-256: 520cef1bcbaa9d4854e16b2ac64e99c0fa2ddc014335e70ada4eeba7a0b49cc9
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify-hosted PDFs, which is characteristic of a link farm designed to manipulate search engine results. One of these links, 'https://ttraff.ru/pify?keyword=eu4+brandenburg+ideas+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing game strategy information.

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=eu4+brandenburg+ideas+guide
    • http://lazebufod.allmetalcornerguards.com/uploads/1/3/2/7/132740564/xulazadepelikoz_witufigamuwumes.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/dofimuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/wuragatuxurojaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/27167535972.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/sharpness_1000_sword_command.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9840/files/nick_scipio_s_website.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/pa_rct101_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/fujoganixuko.pdf
    • https://cdn.shopify.com/s/files/1/0454/5708/0472/files/21212434037.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/free_printable_3_generation_family_tree_template.pdf
    • https://cdn.shopify.com/s/files/1/0462/2663/6954/files/51613139627.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/66764739969.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_off000078fd.bin
6730f6a94dece7188bfcee2e1b8f792af405b95ef0bbba3f552fbe41968bc86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FD 5144 bytes
font_01_sfnt_off00008a89.bin
afd79700ce2b83974b90190ed8d8a41097d756a0f38a26bb7f0b0b269e34e658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A89 11300 bytes

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