Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c94c4c92b08799…

MALICIOUS

PDF

34.2 KB Created: 2020-08-29 18:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33386f644237ec55dcb6f42125b36e65 SHA-1: 0a8d0b19e8bfceb02352fed942b2232adef126bc SHA-256: 63c94c4c92b08799f94293ed34d6cda5b7331489949615bb841338b7c3354301
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to host malicious content. One of the primary links, 'https://ttraff.cc/wix?keyword=flight+trainer+dalaran+legion', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references to other PDF files, reinforcing the link farm attack pattern. No scripts were extracted, but the overall structure suggests an attempt to lure users to malicious infrastructure.

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=flight+trainer+dalaran+legion In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a84d15c123cb4e1bb50c51970a17423d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/60933b_2e30d4f3f4e24db8afb40041a64234f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f0bbb218a3344a518b3ca18c344ff1bf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/51595540789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/asic_budget_planner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/android_9_emulator_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/dave_ramsey_allocated_spending_plan.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2a21f5c85e794d8d9114d9f97d24ec2e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9697dd7740e74475badebf05d2c73e82.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/289c5e_11bda40d8778478488da3d4f3ed8e0a9.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_off000048fd.bin
5a6ce410885a9137aee34cd58f42722636fb3134883174078260a0aa9a2a69fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48FD 4864 bytes
font_01_sfnt_off0000597d.bin
1efe91f9f99c4fcc82bfcf975e89eb0203fb4b353e1c5ac0389628a35c73998e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597D 10288 bytes

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