Malicious PDF — malware analysis report

Static analysis result for SHA-256 387ed6283e008110…

MALICIOUS

PDF

38.7 KB Created: 2020-08-08 18:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b1f08ee3f148b6ee0ae551374c6112a SHA-1: 4c06d8e48fcd07f08bc1dc76e319a85f59b4553c SHA-256: 387ed6283e0081107cfe2662928ae1a562650baf5b8736dbd0cd4a9288969516
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for academic papers, to a redirector hosted on ttraff.com. This technique is commonly used to obscure the final malicious destination and to leverage SEO poisoning for distribution. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=borchert+encyclopedia+of+philosophy+pdf
    • http://files.chrissybreslinschroeder.com/uploads/1/3/1/3/131398091/lokuvafos.pdf
    • http://files.mindfulmoves.net/uploads/1/3/1/4/131438510/vopavaj.pdf
    • http://files.sixteencoop.co.uk/uploads/1/3/2/6/132695576/kikaxe_witipi_xebov_zasotewubewes.pdf
    • http://files.rollerdeals.com/uploads/1/3/1/4/131483584/jokufebidasob.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/31699802778.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/46087355806.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/fuguwijawaxoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/41236188960.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/55049493462.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/legewifazotopamazoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/32972238404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/dosupikefageduvavijid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdf
    • https://cdn.shopify.com/s/files/1/0428/9583/5295/files/1704580325.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/bikoberonotizodulezokol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8188/4067/files/factores_de_riesgo_en_el_trabajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/2944865893.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_off000057ff.bin
e36b94b38f80e52f7dc40f97f8d7882a7913588e8c4b0358b5f24e6cd8b9e29f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FF 5396 bytes
font_01_sfnt_off00006a5e.bin
45be0997c83014a49cb43ee37666d7c5666b9b0c170b92b9886b8e8e3999ca65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5E 10356 bytes

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