Malicious PDF — malware analysis report

Static analysis result for SHA-256 a407d5073671e82f…

MALICIOUS

PDF

39.2 KB Created: 2020-09-09 08:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 998e8ee4ac59391a2b54941c17895796 SHA-1: d8d23ca7f71884bd784824c88881656e25ec5704 SHA-256: a407d5073671e82f1efee68f1d528650ed8bb55f7f71946c4c80f02f1baa0632
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, specifically identified by the URL https://ttraff.club/wix?keyword=chamma+chamma+song++dj+king. This technique is often used to obscure the final malicious destination and distribute traffic. The presence of numerous links to other PDFs hosted on Shopify further supports the link farm heuristic.

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.club/wix?keyword=chamma+chamma+song++dj+king In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8972/2534/files/jawewinaganefameke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3002/8194/files/lab_report_13_the_skull.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/discord_raging_demon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9927/3896/files/63744066271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3471/4017/files/descargar_android_file_transfer_para_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7906/6009/files/gedavilogixarinamegaxojun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/zasokesi.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f65518_72f9fd82a1ee4129a2d6a8d9835ac79f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb894_3f01fc12568d4e318ddcf6fd32e3d311.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/07e02c_bf9ad33fddd2402a9d47bfb4362285cf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ba634_0040af30a7f141c2954c01f0669c21ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/95792218362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/jikoxajozexakuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/mofivejevixoxivefuzuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/wazobutolatuxi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6B 5272 bytes
SHA-256: ae0e68cc425fdc0bacdeed1a55418f4fbcaf0375b7b0f9e5186a3051466bc53a
font_01_sfnt_off00006033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6033 15008 bytes
SHA-256: 1a43f0a2ef7467dd45843e2e85c01241becedfd4caade1ec5021d8a4c477e40c

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