Malicious PDF — malware analysis report

Static analysis result for SHA-256 086c3b689405b55b…

MALICIOUS

PDF

34.8 KB Created: 2020-08-31 08:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3638f2bf6c5a61665a8693556a650887 SHA-1: 1370c435963bb882ce7befc8a89ecfe585a5bb76 SHA-256: 086c3b689405b55bf8738af35bbb8d2877a40e514cd9d88682599560863e0c9e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/wix?keyword=11.s%2525C4%2525B1n%2525C4%2525B1f+biyoloji+palme+konu+anlat%2525C4%2525B1m%2525C4%2525B1', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=11.s%2525C4%2525B1n%2525C4%2525B1f+biyoloji+palme+konu+anlat%2525C4%2525B1m%2525C4%2525B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/1817675113.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/report_burst_water_pipe_sydney.pdf
    • https://cdn.shopify.com/s/files/1/0462/3056/9109/files/hc2h3o2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/vowadumelot.pdf
    • https://static.usrfiles.com/ugd/4b7290_98d7f097b6a4431298ee95a9e66a790a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7453fe166aa421cb9a6576793c7d090.pdf
    • https://static.usrfiles.com/ugd/b8c837_27658155b2dd4e2f99d7be761abcca94.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_ee8225fed3544dfd9fb33472147c465f.pdf
    • https://static.usrfiles.com/ugd/5b9365_056ea40ac9ca485c9e05c06679254fce.pdf
    • https://static.usrfiles.com/ugd/b8c837_9697dd7740e74475badebf05d2c73e82.pdf
    • https://static.usrfiles.com/ugd/9e14ca_8087c06f5fc6426b988e8cb9581392d1.pdf
    • https://static.usrfiles.com/ugd/01bc73_7ade2dec550c461da2d5a7033c53f905.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_51aee505afe046018cb639765ff9c1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_11aa4c9333a142c0af0c7741f0e27970.pdf
    • https://static.usrfiles.com/ugd/b8c837_42f181e00a294d89978bc9d24152c657.pdf
    • https://static.usrfiles.com/ugd/74e9cf_ce520428fd5a4829a06da0e3b89bfa43.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046d0.bin
53605f52a5b2ff9762a4281b0fa462bc39ca5dce961b148f7fe41a7d1a94ad94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46D0 5356 bytes
font_01_sfnt_off00005905.bin
428e5ca8fff07dc2ceee0ef24cc0a3649f38e6995948353d4d130816c52eee41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5905 11280 bytes

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