Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3b2d5d353ebe6d…

MALICIOUS

PDF

37.5 KB Created: 2020-08-01 21:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5cdd43c93862e6a648452d5f76be595 SHA-1: f1c171a19e86279b9cf9b81d4a402d237fea0fb6 SHA-256: ab3b2d5d353ebe6da8cd29222983872d69d90fedcc7e88e3fa87b63b4eeab75a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'cub cadet manuals'. This link points to ttraff.ru, which is known malicious infrastructure. The document also functions as a link farm, hosting numerous PDFs on Shopify domains, likely to improve search engine ranking and distribute malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cub+cadet+manuals
    • http://files.offermarket.us/uploads/1/3/1/3/131383607/7806380.pdf
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • http://files.sareeduniya.shop/uploads/1/3/1/8/131856706/bupipakazulurew.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/26638120068.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/52493123034.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/71929158420.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/83787103519.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/buvobajujarobekudawa.pdf
    • https://cdn.shopify.com/s/files/1/0436/4002/9344/files/bikagitafumidoradiratub.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/gumujojagewugenotugiwito.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0528/files/tujekudosojoxurikoron.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/75578996801.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/juzodabepanagelug.pdf
    • https://cdn.shopify.com/s/files/1/0438/6252/4069/files/58170632456.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_off00004e72.bin
4a14a0358615ea41f9400b5ad401e54f92d07da51b2e873200bc006ddcc9e729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E72 5036 bytes
font_01_sfnt_off00005f74.bin
299804e3414687791de6f6c4549028173d7d08800c9eadfe2c868892887dd768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 13644 bytes

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