Malicious PDF — malware analysis report

Static analysis result for SHA-256 7179b0d8ac58d59c…

MALICIOUS

PDF

40.2 KB Created: 2020-09-18 07:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032163de5c4565efb253655797d843d4 SHA-1: 2f9914d586af07b2cf2e7df387e8ea5447292613 SHA-256: 7179b0d8ac58d59c28cda8a393f111fdbc73999350b37be6a4a159f5c9cd3610
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 suspicious domains and are likely part of a link farm designed to redirect users to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to ttraff.me, indicating a known malicious redirector. The document body, though heavily obfuscated, contains the same URLs, reinforcing the intent to drive traffic to these external sites.

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.me/wix?keyword=classic+lockpicking+guide
    • http://salovonu.drkellieemrich.com/uploads/1/3/0/7/130738971/a2a88e1de46f.pdf
    • http://galadarib.chachingbiz.com/uploads/1/3/1/3/131380005/6151213.pdf
    • http://files.echadmacfam.com/uploads/1/3/0/9/130969408/01ca7149433615.pdf
    • http://files.stgilespreschool.org/uploads/1/3/0/8/130814342/601302.pdf
    • http://nirojeki.amandamosspr.uk/uploads/1/3/0/7/130776366/5726522.pdf
    • http://files.unknowncycling.org/uploads/1/3/0/8/130874205/d41ad730be9.pdf
    • http://files.phkbikes.com/uploads/1/3/0/9/130969426/jovepolowalivigif.pdf
    • http://files.hillarybrownart.com/uploads/1/3/2/6/132695401/moxeraro-boseximuvofaj-biroxubepobewo-mikidiwuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c3342606-8d02-4d92-af6a-fd9cc999d111.filesusr.com/ugd/f1d680_64958425990940a6ac25e84a22abe1b2.pdf?index=true
    • https://9d11f979-b200-4ae8-98a4-9de6b619902c.filesusr.com/ugd/bca722_baff3c3df7f14a7996f6ab5435e0a8de.pdf?index=true
    • https://33155355-59b4-4f2b-890a-e58ad3029499.filesusr.com/ugd/29c71c_cd40f6d3df7d4893b05bdd4fe70600e6.pdf?index=true
    • https://4270184e-e712-409e-8f25-6f452011e7f3.filesusr.com/ugd/f523c3_fde46b57b7bd4eed81c628dec010cf60.pdf?index=true
    • https://3e0f4893-9357-43c1-aa58-6a95bb42dab3.filesusr.com/ugd/69b86f_119e7aa7401446b58724c161529feb40.pdf?index=true
    • https://ce9e099c-2a5a-4e7d-a3f2-5bb31ec120d1.filesusr.com/ugd/197ed4_b38a67da649c455aad7057014be5fa99.pdf?index=true
    • 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_off00006058.bin
972e283232da6f3a5e82849f435a8abe52d0915a6d6a46ceefb629f66ce891cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 5112 bytes
font_01_sfnt_off000071ce.bin
747982740cd171178cd4ad19b680dda52c94c604ef2f6d70cdc3a215d420e9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 10104 bytes

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