Malicious PDF — malware analysis report

Static analysis result for SHA-256 056861984e32d8a6…

MALICIOUS

PDF

46.4 KB Created: 2020-10-09 10:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5803ccd6d5a1c1ca5659f494ce4070a5 SHA-1: ed7e5ea2ee1686e4c91739be8f983ba5d2746d86 SHA-256: 056861984e32d8a685c7aeaf735b3ee4b57aeaa473368ded6f6f5b9fce7b0e5d
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, functioning as a link farm. One of these URLs, https://gettraff.ru/pify?keyword=dewalt+magnetic+drive+guide, is identified as a malicious redirector, indicating a potential attempt to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/pify?keyword=dewalt+magnetic+drive+guide In PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/5348742133.pdfIn PDF document text
    • https://site-1037172.mozfiles.com/files/1037172/mumake.pdfIn PDF document text
    • https://site-1039639.mozfiles.com/files/1039639/89579869055.pdfIn PDF document text
    • http://files.argcircuitseries.com/uploads/1/3/1/0/131070113/kesolise_vofegulojelis_zodezanulenodi_loxovivokuv.pdfIn PDF document text
    • http://vaxajun.trulymedium.com/uploads/1/3/2/3/132302921/7325384.pdfIn PDF document text
    • http://xibijosir.alwaysgrowingyoga.com/uploads/1/3/2/6/132681670/botipo-getegubakidof-sefijinipaka-kefefutali.pdfIn PDF document text
    • http://peloxe.tccobtest.com/uploads/1/3/1/6/131607712/60292b64.pdfIn PDF document text
    • http://naxaperef.microbladingbyz.com/uploads/1/3/0/9/130969862/dufetora_pemax_fotetuzaxel.pdfIn PDF document text
    • http://files.vmiengineering.com/uploads/1/3/1/3/131383823/mozon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3439/4276/files/sigoguwugevarosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7733/6224/files/aa_kingston_middle_school_educational_leave_form.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A0 5004 bytes
SHA-256: 4cfd783ac5458248871170e14f04c78f857fd8cddf8d30813854deba46ea0fa7
font_01_sfnt_off00007aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 10712 bytes
SHA-256: a953a07eaf4c941273d38a01c6956b43e66350744b7fb033c494afadfc72f322
font_02_sfnt_off00009f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F40 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3