Malicious PDF — malware analysis report

Static analysis result for SHA-256 445e8bb5f0fe157f…

MALICIOUS

PDF

48.6 KB Created: 2020-10-05 19:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 321fb3aa3c387ed08f1b7dc92d4f4b5b SHA-1: ff97fefff9f2dd1874ba4c29982c863c3cea11c0 SHA-256: 445e8bb5f0fe157fac8cc64c0f0cb9e348560905a97e196cead90691aa5da006
184 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of link farms, with numerous embedded URLs pointing to external PDF files. One of the primary URLs, https://cctraff.ru/strik?keyword=cattell+theory+of+intelligence+pdf, is identified as a known malicious redirector. The document's structure and content suggest an attempt to manipulate search engine results or redirect users to potentially harmful content, rather than providing legitimate information.

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://cctraff.ru/strik?keyword=cattell+theory+of+intelligence+pdf In PDF document text
    • http://gidafu.allisonmilmoe.com/uploads/1/3/1/4/131453574/fcf7c7e0533996.pdfIn PDF document text
    • http://gitoz.sensibleshock.com/uploads/1/3/1/4/131407005/2214796.pdfIn PDF document text
    • http://files.kenjorgensendesigns.com/uploads/1/3/0/7/130739678/ffde91bebd61e6.pdfIn PDF document text
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/fepobuverimivaduser.pdfIn PDF document text
    • https://site-1042624.mozfiles.com/files/1042624/nobivadenak.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/43361250413.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/24905406197.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/wedizapupaj.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/kozoligubukelo.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/55601569368.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/10045427357.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/1/0431/9179/5875/files/synonym_for_strategic_thinking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4080/6824/files/76702129911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2471/9261/files/age_of_consent_in_kyrgyzstan.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_off000080b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 5244 bytes
SHA-256: 21e1d7b27810554037deb9f7ace6e6c902b4fa02c932e1d1c2227368e52bbb85
font_01_sfnt_off0000928b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928B 10176 bytes
SHA-256: 53d4fd02b94d838e0d24ce062e7d1797e0a462f6d27fc77a4e94547aecf9321d

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