Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9af6fae006d545…

MALICIOUS

PDF

41.2 KB Created: 2020-09-30 12:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a6e941c09680cee4d77d8ae3ebe6c15c SHA-1: d790d0ba95c0fb7c1fb358cb6f4d1536ab4288c3 SHA-256: 4e9af6fae006d545671c87275fa6ae60677954334ad370c92f5e7554157f075a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm or phishing attempt. The ML classifier also strongly flagged this PDF as malicious. The primary goal appears to be directing users to potentially harmful external websites.

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/strik?keyword=characteristics+of+sound+in+physics+pdf In PDF document text
    • http://vunil.cheryllynnplett.com/uploads/1/3/1/8/131856539/rikewoto_jatikajatatuf.pdfIn PDF document text
    • http://mixono.normanchildrenchorus.org/uploads/1/3/1/4/131453850/tuwuvuxuxa.pdfIn PDF document text
    • http://bated.hakalauhome.com/uploads/1/3/0/8/130873843/d54708fda1.pdfIn PDF document text
    • http://midexu.indianrocks.com/uploads/1/3/1/0/131071041/c08613a8b740e.pdfIn PDF document text
    • http://famako.mommashali.com/uploads/1/3/1/1/131164462/gigovozozafati.pdfIn PDF document text
    • http://tixaji.sweetwoodlandfarm.com/uploads/1/3/1/4/131453598/0d98cad6e498627.pdfIn PDF document text
    • http://safaduwa.mihlsa.com/uploads/1/3/1/6/131606279/gatipuze.pdfIn PDF document text
    • http://givazokin.tryingtofly.net/uploads/1/3/1/8/131856097/nutuvutu_wamesinaxawaze.pdfIn PDF document text
    • http://files.pampervanbeauty.com/uploads/1/3/1/6/131636984/legavilopuvubusujup.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/1/0436/9540/7269/files/comma_code_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5740/0994/files/history_of_multiple_thyroid_nodules_icd_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/ponewot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6441/7694/files/columbia_college_contemporary_civili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/34300153451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4d7c86-274e-443c-8a24-29f3fb0ec151/61539112623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268116bc-a810-4dd3-bb68-455493da2a5c/mitujumatowefoxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dd7619-a14e-4551-9fe9-0513ccad70ab/47492992881.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 5220 bytes
SHA-256: 635ab8b608478563a594970d9aed9e879c26a298cf3db3e233869cebed3a48f0
font_01_sfnt_off0000752f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 10132 bytes
SHA-256: fed48800b52b29865c475fcca23a9646eeac939c57cc198db5cd5116fd4c24d1

Open this report in the interactive analyzer, or submit your own file for analysis.