Malicious PDF — malware analysis report

Static analysis result for SHA-256 2410510b99d91f46…

MALICIOUS

PDF

43.9 KB Created: 2020-10-27 09:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 21926e4f9d211f3382dc4806deb84bc6 SHA-1: 96ff135ca57650b46f746e0a294b69935d26bdb0 SHA-256: 2410510b99d91f469160e9494de8bf5a45099cb8a36551e806fe6269f799cb84
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the document's structure suggests it's a link farm designed to drive traffic to potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.com/123?keyword=half+orc+wizard+miniature In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/87574e307a.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/pugamukusog_jexube_fuwoxiginor_tufuzudokumuw.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/dovakit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f8a16141f362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8aa2898bcbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f8aaded84f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f94e9481c196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f87f30fa40bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f91faa360da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f8911c0c45f8.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/3d263c1ca.pdfIn PDF document text
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/4dcb5db1cc47c.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/ledediva-tereja-benuliv.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/vezumobigodub/que_es_la_bacteria_helicobacter_pylori.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/chemical_synthesis_of_amino_acids.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/54800683684.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/piwenevixazixevumemupukul.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/angina_inestable_fisiopatologia.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/adobe_audition_cs6_user_guide.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_off00006e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 5092 bytes
SHA-256: dfd68f9b32abb9a46ed332e837b79ff992b2883db5c95cf626a92a92861804d9
font_01_sfnt_off00007fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE5 10360 bytes
SHA-256: ffdec6ca94746afc20ac71f22495f1f19b789bbaa79b5b7a1309fbe3e12daf92

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