Malicious PDF — malware analysis report

Static analysis result for SHA-256 265ab61b3fc4d7cb…

MALICIOUS

PDF

56.0 KB Created: 2020-09-17 16:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182455e15b88c1ee687a3556dfe02fe3 SHA-1: 178d45e53e94ebac1fe2df927c33a33d188c7e03 SHA-256: 265ab61b3fc4d7cb723828578b349fcd0210d13790ec7ef37c9c4ed99b86d0c3
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains numerous links to external PDFs, indicating a link farm. One of the embedded URLs, 'https://ttraff.club/wix?keyword=crystal+star+women%2527s+dryness+extract', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a link farm and a malicious redirector strongly suggests a phishing or malware distribution campaign.

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.club/wix?keyword=crystal+star+women%2527s+dryness+extract
    • http://files.vcgallery.org/uploads/1/3/1/8/131856381/rokererukirejakifu.pdf
    • http://files.geogbarrbeacon.com/uploads/1/3/0/9/130969209/tibelesaxato.pdf
    • http://files.usabmxtees.com/uploads/1/3/0/7/130738714/xosabo.pdf
    • http://sigil.onondagacommunitychurch.org/uploads/1/3/2/3/132302857/wijawibemij_vasemazusoto_xokuwomejinod_gusukusoxi.pdf
    • http://files.jujuic.com/uploads/1/3/1/8/131856664/wusibogav-sivexaber-vabijobafaso.pdf
    • http://nelapur.samplegas.com/uploads/1/3/2/7/132712019/ecf5fc62.pdf
    • http://gumevixox.delzoactive.com/uploads/1/3/1/3/131383708/8470448.pdf
    • http://files.farmingtonrestaurantweek.com/uploads/1/3/2/3/132303068/butob-luliniw.pdf
    • http://vudapiw.moduswaste.co.uk/uploads/1/3/0/7/130740082/19ed0db.pdf
    • http://files.shineonpro.com/uploads/1/3/1/4/131438330/bizobejogozikuzem.pdf
    • https://c3920484-15a6-48b5-aaec-437e39056ed9.filesusr.com/ugd/9ff9b8_ae43a62200d74fa08e525911ada9b7c3.pdf?index=true
    • https://01365aff-a253-4fbe-99c7-e2c1a4a2e56b.filesusr.com/ugd/665c20_13f4399c1bb748c5b73aabb24aa7fed4.pdf?index=true
    • https://281c2068-2cb7-4bea-aa25-8af251d63042.filesusr.com/ugd/49f5ef_226430cc219e4bb7944fbf07e017296b.pdf?index=true
    • https://1d732b2e-8cb3-4edd-b3f0-6ca84f2f3f78.filesusr.com/ugd/8508de_553c73478544483b8926f2ff888fd2a5.pdf?index=true
    • https://adbce6c2-e5dd-48ed-a623-1381f709dd12.filesusr.com/ugd/b58d21_913c013197a5412984af44b30249b8f4.pdf?index=true
    • https://8992bc6f-fa31-4612-b70a-f09da094ad2e.filesusr.com/ugd/99afdc_2e8399bc106f4534871ab7b4e0dee5be.pdf?index=true
    • https://f7929993-41b0-42b0-8815-d173f37be073.filesusr.com/ugd/5bb01c_1be27fe50d6b4c11be90583d6c27061b.pdf?index=true
    • https://624d1dfd-2c3a-468c-bc6a-b2292e7d867c.filesusr.com/ugd/7ef0dc_c5a2b3944dff416a827533d1f568e014.pdf?index=true
    • https://05571a82-46b5-484e-a5bb-7f4006df0e67.filesusr.com/ugd/b1b16e_ffad1a0bf24c4368969e7d7bf3c63dfe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c75.bin
0bde0447286d31b9900bcaae465bf41be7ff14405a6cb39dfac2a656ce34c759		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C75 5288 bytes
font_01_sfnt_off0000ae77.bin
42a26618b88300d104a3434d8becbd617bf8d891fca1ef53452eb3c3f0f1fb6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE77 10516 bytes

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