Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3cf3284b8611a4…

MALICIOUS

PDF

42.9 KB Created: 2020-08-22 12:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4627d4af5c4df1d3bc406eebfa61e8c8 SHA-1: 63d34a1d9c50784917c16db014abae4f26a0a3da SHA-256: 4d3cf3284b8611a495d0f455be2d14c9a01eb3684a2613e0e5ef17c7d8090516
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, https://ttraff.ru/pify?keyword=angular+5+data+binding+form, is identified as a malicious redirector. The document body contains garbled text and what appears to be metadata, but the primary malicious functionality is the redirection to external, potentially harmful, URLs.

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=angular+5+data+binding+form
    • http://files.becomingyoupsychology.com/uploads/1/3/0/8/130813054/tedegiw_sifabatukij_bamefewup.pdf
    • http://files.walloandlily.com/uploads/1/3/1/3/131381675/rudonesazajuba-jugovetesani.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/teroga.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/dorelufagoredixitodiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/26516478442.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/bookmarking_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/fuvokubigulanuvuzin.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/windows_95_img.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/60652584135.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/kruppel_engel_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8215/files/tn_tet_answer_key_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/55476623316.pdf
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/atlas_netter_editia_7_romana.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_off000061e7.bin
186546765178bff5437701deadf48072b2b748867758ce93f964bb49423a37e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E7 5300 bytes
font_01_sfnt_off000073db.bin
c578f027cdea50a160d25f79ed3d222f80e36c655e7d51ba04062d6366def983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DB 13576 bytes

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