Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e36770a87646ffe…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 02:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b1127804c613f74f92e3def8585472d SHA-1: 9a89f81ccd2598a6721c9f805284c6a19bb5d6a7 SHA-256: 6e36770a87646ffe1f861ed956b2be6777abb6076f33da29d1569adab92676b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.cc/wix?keyword=twenty+two+twilight+zone, which is likely used to redirect users to a malicious site. The document body itself is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

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.cc/wix?keyword=twenty+two+twilight+zone
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/41336978393.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/tupufuzeporugof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/vebafavulizelevepodunan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1622/3906/files/performance_award_certificate_wording.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/carmaker_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/jojafaburunabelezebala.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/pumomam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/padodi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/raras.pdf
    • https://cdn.shopify.com/s/files/1/0448/5578/7681/files/maraturorolavijunijofo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/velebananofer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/romeo_and_juliet_act_2_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/28102420873.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/individual_development_plan_template_doc.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_off000064a8.bin
a6d026725b7322f1bacb0e64ce378cad7939d7f8768c083318601c32739f775e
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 4656 bytes
font_01_sfnt_off000074a3.bin
7ba35ed737cf0f86dc16ee929aa729aeb7f4ffb59e57c210ad83a9554aa0b07c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A3 10264 bytes