Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62d2e1e783636c1…

MALICIOUS

PDF

39.0 KB Created: 2020-11-09 11:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b650ab3594c03adf56d36e216e4a0a21 SHA-1: 42f8603a771b6c7b805d231a60cbf0352eed442b SHA-256: b62d2e1e783636c1c9e487186f195c272ef16991bfbd8657bdf7884c6b52ab33
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, includes the URL and keywords suggesting a lure to disguise its malicious intent. 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 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.
  • 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/aws?keyword=author+s+tone+worksheet+middle+school In PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/kujeluso-rujuporixotem-puzadabe.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/tolajisaxela.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/tuzozajeruru.pdfIn PDF document text
    • https://lipitedo.weebly.com/uploads/1/3/4/3/134380968/gotebewovosesiritixo.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/7011911.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/dogazisuze/mary_chilton_1607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f08c60-b677-4d39-a86b-b9e79a3f18a0/lifipuzigedis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2eff000-17da-4643-85d0-08b502961049/kititobupiguwow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de714a08-6f91-4131-863c-01c54e63134b/falizuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917d0d6a-336b-45e3-a4a2-cd475001396c/tuduxekab.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/tinuwebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ca7594-9844-44bf-a49c-0637c9ed62be/11531232590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc6877a-7e83-495f-9e1a-37184189e85e/47148836099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c802be8e-3b68-444f-979c-5df7a7d32c45/language_testing_international_reviews.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_off00005cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDD 5112 bytes
SHA-256: dc5bdbd43b141d4c5a22f4a886e83f47d6af6e1f68ae203d476559f8de6775fd
font_01_sfnt_off00006e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 9688 bytes
SHA-256: cff8a4f3373aedfc5c03b8efb2854a7fccce81e52b46dfa88caf1df3c097d8db

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