Malicious PDF — malware analysis report

Static analysis result for SHA-256 83be44f67c3869fd…

MALICIOUS

PDF

39.7 KB Created: 2020-09-16 13:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 080bb5f43961f1768987145bf561bf21 SHA-1: ba3c339689fbb8cbc0b3354bd54cad1443ce75ef SHA-256: 83be44f67c3869fd850cc19fd5e507237f5e137221a247742b62b091e0efd309
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure. The primary link, 'https://ttraff.club/wix?keyword=blue+sky+ecological+reserve+mountain+lion+attack', suggests a lure to potentially malicious content. The document's structure and extensive link farm indicate an attempt to drive traffic to external, likely malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=blue+sky+ecological+reserve+mountain+lion+attack
    • http://files.auchengraychurchcentre.org/uploads/1/3/1/3/131379174/piwiveninaje.pdf
    • http://xipeti.netsib.nl/uploads/1/3/1/6/131636991/mukurelovarotak_kizunolot.pdf
    • http://nixez.thegoldshopofmartinez.com/uploads/1/3/2/7/132740470/403c8eb7abd.pdf
    • http://fivujim.dorsetlupus.com/uploads/1/3/1/6/131606218/dolodovobogosupej.pdf
    • http://bonubo.keithalman.com/uploads/1/3/0/7/130739561/lapusosusew.pdf
    • http://files.alpatsminiatureschnauzers.com/uploads/1/3/0/9/130969938/eb955a952806004.pdf
    • http://files.theduangroup.com/uploads/1/3/0/7/130776754/geterajefoguvivewa.pdf
    • http://sobereje.aasvehiclesolutions.co.uk/uploads/1/3/2/7/132740494/9870824.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c2af496b-23ca-4f77-8911-43bac8d1049d.filesusr.com/ugd/89064d_9baddf8010364cd39f2fe169879f5865.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/56723315840.pdf
    • https://cdn.shopify.com/s/files/1/0454/7097/4118/files/controle_da_administrao_pblica_concurso.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_off00005cb3.bin
03fd5917ef7dc2f703741dc48abbd8a4e18fc41dffab3730ef924eaf2ff14b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 5396 bytes
font_01_sfnt_off00006f12.bin
ef06b6d04c75742d3c7bc0af6f07c0ef2d38aae772bc696fe331a9269ff69ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F12 10236 bytes

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