Malicious PDF — malware analysis report

Static analysis result for SHA-256 843649aac3369805…

MALICIOUS

PDF

44.5 KB Created: 2020-10-27 12:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 489eb94dc792f7aee9ee0a081550b16c SHA-1: b7a3a34cb152493b53c362ef3b21e2651f99e957 SHA-256: 843649aac3369805ef70167f2af90f85e3acfd4b05e412f2303835cb6616d996
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/123?keyword=industrial+and+organizational+psychology+spector+pdf', suggesting a phishing or redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.link/123?keyword=industrial+and+organizational+psychology+spector+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f88a5a2be5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f9741652ee67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f8807e3a5e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8e34395f798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f891f520061a.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/2503880.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/680db7ff99.pdfIn PDF document text
    • https://donixefafara.weebly.com/uploads/1/3/4/3/134310569/kuwapikup.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/8cc7c75a98.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/9448661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/94710556342.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/biafra_civil_war.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/dynamic_meteorology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9e61a6-0552-471a-beb4-6ab166534b09/2625889854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222f200c-7462-4888-96c7-054915be1869/60760830013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/79809413412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6261/9033/files/desekomevetajagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1551/2479/files/beach_buggy_racing_go_premium_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4998/3905/files/what_is_the_total_distance_x_traveled_by_the_particle.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_off00006cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 5508 bytes
SHA-256: f1ac5aa15ad474ed38ae93dbb5bca36346a641204e837912b66e4306b84c2d66
font_01_sfnt_off00007fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 10788 bytes
SHA-256: da87d5eeaa26a6bd065320ebc9486e1cfe467576e4c9642f747eff1590a04672

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