Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a21f59388290a1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 02:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73496fdc7c3848e864a66d61854968a6 SHA-1: 1821d6e159bb22c06739724fd60e1fa68b4ef1d9 SHA-256: a8a21f59388290a193375f8b56b9c19a43bf117ac758e68043cd4463916e35f8
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a tool to remove watermarks from PDF files. The document also contains a large number of links to other PDFs hosted on various domains, suggesting a link farm or SEO poisoning attempt. No scripts were extracted from this sample.

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=wondershare+pdfelement+remove+watermark
    • http://files.shopstudio233.com/uploads/1/3/1/0/131070212/0f4b8d6a22e.pdf
    • http://files.besafesafetysupplies.com.au/uploads/1/3/1/4/131452880/9894281.pdf
    • http://files.eljardinometepe.com/uploads/1/3/1/1/131164479/6325507.pdf
    • http://files.mooringsmagothy.org/uploads/1/3/1/0/131070289/4367790.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/jaloxidulikobad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/xonizixilipakupit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/106955567.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/sexobekixinusegegeni.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/dust_2_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/60209161635.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1615/files/a_noite_do_meu_bem_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9349/files/52524858698.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/medivapilujoduzugor.pdf
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/sawuwasomakovasijenene.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_off00005ff9.bin
dc8ae6eaa6352f9eae862286901ddff7542efe85788d7e75a6036df89d6412df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 5512 bytes
font_01_sfnt_off000072ab.bin
f15fcbf9a9c79513a5e6a5de63f45efcff28b3088632245d22ae97ce9ec6170b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AB 10064 bytes

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