Malicious PDF — malware analysis report

Static analysis result for SHA-256 6000de20e9bd1261…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 08:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a3a123042cfbd6745841ba99554ccf7 SHA-1: db41b8224a77cd0619aee19e01fef65aaa5fe9a3 SHA-256: 6000de20e9bd12617634335d278c36833abff94aa696f62d4a20cf4b36246b2e
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs, including the primary redirector 'https://ttraff.link/wix?keyword=intervenciones+de+desarrollo+organizacional', are the primary indicators of compromise.

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.link/wix?keyword=intervenciones+de+desarrollo+organizacional
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_22cf1212154446df87a2a48f71669641.pdf
    • https://static.usrfiles.com/ugd/b8c837_efec9eb68e56477fb6a6a8eed6735244.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b57079a03574ee384b79c52a839f77f.pdf
    • https://static.usrfiles.com/ugd/b8c837_67eb5d5703fc4132aa067bcf59a9372d.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_311d665a4cec428cb88ca415b7f4dc25.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/41601017361.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/cambiar_formato_de_a_word_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/nodowakiwinobidebajeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/ap_synthesis_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/english_grammar_opposite_words.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/70916053488.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/transport_international_routier.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/dreamweaver_cc_2015_templates.pdf
    • https://static.usrfiles.com/ugd/ce14f3_1dece7c411d746559b9868edd765e07a.pdf
    • https://static.usrfiles.com/ugd/191a6d_a85af8321c7a4afca7fbeac0de31b6f6.pdf
    • https://static.usrfiles.com/ugd/4725f1_28cf54927ada4b50888dac1f268223b0.pdf
    • https://static.usrfiles.com/ugd/4d400c_89e38fb2ca184d3eaa59738ee8b01dfa.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_off00005dbc.bin
6d583de4892b954c79a97c6575935fd9dc02f57c7aca9a55ed86bd1a19fb0aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBC 5152 bytes
font_01_sfnt_off00006f59.bin
9b7cb4cc5586aaf5c7f1709d680362019ffea4def559fb067634ded10e79ca18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 10120 bytes

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