Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba769245f5ed07bc…

MALICIOUS

PDF

54.4 KB Created: 2020-10-15 16:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8577c9c440c44049637558d277703e9d SHA-1: bdee1315bc1f2e6b0f8408d831023a61be060e10 SHA-256: ba769245f5ed07bc20d30c1734d5a7aafa0b9cb5ac97b1575d3ed7b77385cd5b
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of a URL like 'https://gettraff.ru/123?keyword=missguided+clothes+discount+code' suggests a lure to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/123?keyword=missguided+clothes+discount+code In PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/poberopubusoxi.pdfIn PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/978f1bce71.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/vekiviwuxunajuxi.pdfIn PDF document text
    • https://site-1043373.mozfiles.com/files/1043373/34224166566.pdfIn PDF document text
    • https://site-1043894.mozfiles.com/files/1043894/noserejalutanes.pdfIn PDF document text
    • https://site-1043414.mozfiles.com/files/1043414/dujaxijiwaxukefo.pdfIn PDF document text
    • https://site-1039311.mozfiles.com/files/1039311/17270432795.pdfIn PDF document text
    • https://site-1040284.mozfiles.com/files/1040284/35143763307.pdfIn PDF document text
    • https://site-1039426.mozfiles.com/files/1039426/3122796575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f876b7e007c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f874fbcd6bd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f87526e3f1bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f87a05f40f99.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/fukun-zexepimikupi-jutanu-garibadile.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/murum_sugiz_natonajafikutiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/2934841584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7885/2007/files/joronomedikekaxurupobawo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 4900 bytes
SHA-256: 23b0062b18c6dc40a1f8a6c860d135470cb171fbbc2bfc8f044c791cf207609c
font_01_sfnt_off0000919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919F 10812 bytes
SHA-256: 6aa1f189f840f6923025c4a5c95e93fac4d0df6b3aeec70853ec0f8d4567256a
font_02_sfnt_off0000b6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C9 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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