Malicious PDF — malware analysis report

Static analysis result for SHA-256 371ea040686d3e07…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 14:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: feeff70f653220ba19aa18a3771ce258 SHA-1: 2d99d0444fb36f79a134750c3d86365436470022 SHA-256: 371ea040686d3e0740685b342a582ad938ae0c431ce849cfbc6f787d21774352
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though partially obfuscated, contains text and URLs that suggest a lure to download further content. The presence of a malicious redirector indicates an attempt to lead the user to a compromised or malicious site, likely for further exploitation or malware delivery.

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=fontanela+bregmatica+pdf 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/1/0466/7991/6709/files/relofopem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/datevuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/10880217519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/0687/8886/files/bollywood_movies_mkv_free.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e175e5fc7a024085aeb4e680d025616e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/83b1b3_7c9df1c57c13450eaa6b93954b952f8a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01bc73_1b9dce2bd4ab4dcc8325bbc78c4a89a2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/piwoguwibupuvibepaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/9724/5094/files/nukumawigolarumelejete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7519/9391/files/anemias_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/menasoloxeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/motorola_surfboard_sb5101u.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/php_numberformatter_remove_currency_symbol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/69718555086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/viriruvepimodatan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2655/4781/files/19788364485.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_off000060f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F6 5392 bytes
SHA-256: f1e7c3415e5d56d0edc87d30b89e3d8e7f45a528cf270aea8f792b3b208fad2a
font_01_sfnt_off00007339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 10592 bytes
SHA-256: f8cb2f681550b8411d0f36e22d2326d3087563fa7c17ab93fe557f38a3acead8

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