Malicious PDF — malware analysis report

Static analysis result for SHA-256 9939e6ed215f6391…

MALICIOUS

PDF

81.0 KB Created: 2020-08-23 10:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8be5393c7ec29cf70172572b8d90e9c1 SHA-1: 8c0fe3826499cd6c219ad7e7fb36ae3812ad596c SHA-256: 9939e6ed215f63912ea5fe4906c619e159e6925a1ddc441df3b19c880cbc1000
162 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector and part of a link farm, disguised with invoice-like language. The embedded URL leads to a known malicious redirector, likely intended to deliver a second-stage payload. No scripts were extracted, but the document's structure and linked URL strongly suggest a phishing or malware distribution attempt.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=akuntansi+keuangan+2+pdf In PDF document text
    • http://files.thesociologicalcinema.com/uploads/1/3/2/3/132303012/8a3dbee82f861.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/1/0440/0896/4246/files/buff_dudes_bulking_plan_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/rational_numbers_worksheet_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/wonenebojipevufelovop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2100/4963/files/basic_virology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/41625835590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/cursive_bed_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/sunovuregepikajinalizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8468/5220/files/read_text_file_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/64929013794.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_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 5268 bytes
SHA-256: 2abda76f60e53b5ec117fa562bc1f19cec45ce065051c229257d8a4d1d5f2e98
font_01_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 13660 bytes
SHA-256: dc4cb8cd0b64c812bc03e354e3a71b79b344dfda4281bb3f9d71a9cb5569ac06

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