Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d688ccee3c90e4…

MALICIOUS

PDF

41.3 KB Created: 2020-08-09 11:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4491227f15457446a198aec885e5c5c1 SHA-1: 6a2b93295a49333b49186f9b8a7580048c797d9a SHA-256: 88d688ccee3c90e447a76d7357cfea88bd739eda0e417f21b9b4f21ee2745de7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=board+games+to+learn+english+pdf, is identified as a malicious redirector. The document body, though heavily corrupted, contains the text 'Board games to learn english pdf', suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links indicates a potential SEO poisoning or link farm strategy to distribute 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.cc/pify?keyword=board+games+to+learn+english+pdf
    • http://losafe.helenaaves.com/uploads/1/3/1/4/131437657/petufokemugazebar.pdf
    • http://files.tetiana.net/uploads/1/3/2/7/132741099/ef6534.pdf
    • http://files.norfolkbigdig.com/uploads/1/3/1/4/131437074/limutod_lobuleruxa_gogodoroj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0709/files/suicidal_thoughts_biggie.pdf
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/xizomiwavof.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/el_negocio_de_bienes_races_en_mxico.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/litarulitidamakeku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8078/files/26231345457.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9144/files/duximasebifav.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/lawadoliwifatumen.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/13608064612.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1287/files/balusunufetanamememutulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/welevabogujobuladotamapot.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1586/files/95019375449.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.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_off0000632e.bin
60fe61c4d83f0a58df2ca9e9b7a07ad6ae3e75a0514663cc6a83fa8a78fb7059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5504 bytes
font_01_sfnt_off000075ba.bin
a2299f190ba8af280c696b131087dcb9c1df3ab08afc468ff23e7aa9b40ac390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 10156 bytes

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