Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21cbaef20ae8c6b…

MALICIOUS

PDF

46.2 KB Created: 2020-08-04 19:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a1c02dd95405e1a76957bd64c4a32f SHA-1: 91d1397fe644e29d069fce27f180f5f0e3c53718 SHA-256: d21cbaef20ae8c6b538fc21e79d4abbbb49fdfe758ab9a1968e202b286f976b2
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a string resembling a book title, 'Barron s essential words for ielts pdf', likely serving as a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination.

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=barron+s+essential+words+for+ielts+pdf
    • http://files.cheyennebrubacherphotography.com/uploads/1/3/2/3/132303013/0c21d7751b4f5.pdf
    • http://files.xoskshop.com/uploads/1/3/1/3/131381539/miseve.pdf
    • http://files.aestern.org/uploads/1/3/1/3/131379213/7934677.pdf
    • http://files.thetravelingtacos.com/uploads/1/3/1/4/131407898/bolekebeniraxopa.pdf
    • http://files.sturner.com/uploads/1/3/2/6/132681038/juwosedegixe-zuragapeva-xarata.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/jilejowoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8439/9270/files/fisuvonus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/66202979665.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/taleriruzifokemudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/75563734992.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/86285710122.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/38068832173.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/xorifejolamus.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/20426644485.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/5681581576.pdf
    • https://cdn.shopify.com/s/files/1/0431/8884/6753/files/27971836789.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/tuwono.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/rurejusanitagoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/tifejidewok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006126.bin
f7a01b4b7df6a62954c9e0eb614798999e6916d021c66cba8bac9aecfed365e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 5176 bytes
font_01_sfnt_off000072e6.bin
b748354c0f81ba0898708b0390423dedcf5b2391e26136bf9004f15d9ebc6348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E6 10372 bytes
font_02_sfnt_off0000966e.bin
b5f3ffe332da224e97c9ab581af8a20b8d95ebc58bae4d482cc64425e9e68dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966E 16120 bytes

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