Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3da09356a602c1c…

MALICIOUS

PDF

86.4 KB Created: 2020-09-17 09:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a258dc33473e11c1df506fb77d4f73 SHA-1: 6e685d25dafc8db433466c3005e1eaac66f9969b SHA-256: f3da09356a602c1c286ba5bae0c59c9cfe8307c1256068933829289b8cc6a2cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL `https://ttraff.club/wix?keyword=mitsuru+social+link+days` is flagged as malicious. Additionally, the file exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.club/wix?keyword=mitsuru+social+link+days
    • http://files.amartandprint.com/uploads/1/3/0/9/130969003/a8312.pdf
    • http://tikotat.jreschkeart.com/uploads/1/3/1/3/131381518/perix.pdf
    • http://kimamase.newlifechurchsf.org/uploads/1/3/1/4/131408027/rufevuluda_roxipewanixagos_vaxiruwofo.pdf
    • https://55eed06b-889a-46d6-a1a2-134f79671a68.filesusr.com/ugd/2f7489_45b0693479b9490dbcee7e2985b0444d.pdf?index=true
    • https://0adbb13f-3bf6-44cf-930c-62b20e115990.filesusr.com/ugd/7603ae_ecc11c1885a4469cb9e5597550c1c256.pdf?index=true
    • https://08282ef9-3996-4f32-985b-52e89a5b8758.filesusr.com/ugd/6cabbb_c88b1cd7e8404afea8af30d6c1bf67f8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/6918/5943/files/biodiversity_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/dizovibolikumimerar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/pmp_guide_5th_edition.pdf
    • https://b7b49239-c06b-4e56-9b54-d8a7f81b25ee.filesusr.com/ugd/7d21c0_f73f124ffdc94c4eaa35f347be7882a3.pdf?index=true
    • https://d3d8a330-9426-443a-82d9-509afb6ded24.filesusr.com/ugd/aff7ca_9fa93200150449e8b236cd81dd2b9470.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f568.bin
b56c2cf4be8089c34aa2cd7a27030a8f1c33636469400187268b7fe0908bb9dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 5616 bytes
font_01_sfnt_off00010935.bin
dcabd1bedb5d8a848ca01e09bd94c4efc769c0e90c0b7c0a79ff3ad63da4cb87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 4868 bytes
font_02_sfnt_off000119d0.bin
714b67426541d587076cff475ed0b602800a56a78a8ad5dc50f87eca934267b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D0 10644 bytes
font_03_sfnt_off00013e1e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1E 4324 bytes

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