Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa8ba3cd77da959…

MALICIOUS

PDF

45.2 KB Created: 2020-07-08 12:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: ebb61bf696f40a0957c9fa64282e8743 SHA-1: 23aa1facb9af1a7bf4d0223c4b14c0c775c5dd72 SHA-256: 5aa8ba3cd77da959ceb4ddd2bf4a906520fcbebc80168ed8e77d0918b2a5e8bc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to disposable hosting and are likely part of a link farm. One prominent link redirects to a malicious URL, suggesting a phishing or malware distribution attempt. The document body, though malformed, contains keywords related to legal documents and a URL that appears to be a search query for a template, further supporting a lure-based attack pattern.

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.cc/wb?keyword=free%20separation%20agreement%20template%20ontario%20pdf In PDF document text
    • http://files.husbandandwifeworldtravels.com/uploads/1/3/1/3/131381612/2a43e92ee517a4.pdfIn PDF document text
    • http://files.alaneisenstock.com/uploads/1/3/2/8/132814239/tiwopijomudi_wataxabe_benug_jomosoki.pdfIn PDF document text
    • http://files.thelastvilla.com/uploads/1/3/0/8/130813668/xamevet.pdfIn PDF document text
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdfIn PDF document text
    • http://files.oliveadobe.net/uploads/1/3/1/1/131164007/kanaligilagu.pdfIn PDF document text
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdfIn PDF document text
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdfIn PDF document text
    • http://files.barrvillemc.org/uploads/1/3/0/7/130776118/423244.pdfIn PDF document text
    • http://files.one-voice-ethnic-missions.com/uploads/1/3/1/4/131407823/d9ab80aed869f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://metusazeb.files.wordpress.com/2020/06/9030078932.pdfIn PDF document text
    • https://dakirujajuri.files.wordpress.com/2020/06/zugolasufuzolisiwizuvamek.pdfIn PDF document text
    • https://nakaviditane.files.wordpress.com/2020/06/41723097705.pdfIn PDF document text
    • https://fesegopized.files.wordpress.com/2020/06/tosowowuzobu.pdfIn PDF document text
    • https://tuvivamitoti.files.wordpress.com/2020/06/jorulanokudaduburab.pdfIn PDF document text
    • https://zamosoxodinu.files.wordpress.com/2020/06/61690873215.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B6 5104 bytes
SHA-256: 54b100de11e49342ea9b2fd627da6472b3b6212433602c1f1a7f482c7506d3be
font_01_sfnt_off000085f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F5 9928 bytes
SHA-256: 1306af4bfcfaf34422926cedc0b4d88e5ef724c06e31a454d279386622e4b16b

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