Malicious PDF — malware analysis report

Static analysis result for SHA-256 704a5561ac703712…

MALICIOUS

PDF

43.9 KB Created: 2020-09-03 05:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11e5feadad3042532eb9a193eb561a5e SHA-1: 0d6c920e63b28ea85db80d58dab2dfb5bad5bc96 SHA-256: 704a5561ac703712b05aa9d93f1737283ec3bbe525a2d29492460d55d7db2e38
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=child+care+design+guidelines+ontario, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points towards a phishing or malware distribution attempt.

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.com/wix?keyword=child+care+design+guidelines+ontario
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/52305121332.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/the_aeneid_of_virgil_allen_mandelbaum.pdf
    • https://cdn.shopify.com/s/files/1/0428/4284/9446/files/wejebok.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/90ml_movie_tamil_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0433/2922/4857/files/pares_biomagneticos_por_orden_alfabetico_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0464/7603/4198/files/74108024948.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/valobuvulepisiped.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/desired_capabilities_in_appium_for_android_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/juwixazulukixozozupotap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/62451085688.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/52550345970.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/bokunijid.pdf
    • https://cdn.shopify.com/s/files/1/0431/8176/8872/files/eric_meyer_css_reset.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/conan_exiles_yoggite_mask.pdf
    • https://cdn.shopify.com/s/files/1/0462/5340/8405/files/feviwalezozidafukemuruko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/remejegenejuw.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_off00006fb7.bin
71ce4e78c3132bd3d5996e8d00c3a4892baa49fb13bb8d69c4fbc9af9e627a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB7 5104 bytes
font_01_sfnt_off00008103.bin
5498525c9014b99794d12e0f2d763f681df442e85f6ad87395242b703b3edff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 9852 bytes

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