Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb61c018d84a86fe…

MALICIOUS

PDF

43.9 KB Created: 2020-08-22 14:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89bfdcbff0e07aba745248af381eeb95 SHA-1: c321225496e0e56752eb78001b35c400e526de7d SHA-256: cb61c018d84a86fea9325e4b346c2f7f0d8f1f1f374d47c27f16368b41d88b27
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as academic content, but the primary link redirects to a known malicious URL. This indicates a phishing or malware distribution attempt. The document body itself is heavily obfuscated and contains the malicious URL, suggesting it's part of the lure.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/pify?keyword=pengantar+akuntansi+syariah+pdf In PDF document text
    • http://files.innovativestoneart.com/uploads/1/3/2/7/132712174/5551374.pdfIn PDF document text
    • http://files.gladewaterathleticbearbooster.club/uploads/1/3/1/4/131453121/9425687.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/1/0435/6866/0643/files/77019948311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4164/7766/files/redilego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/network_marketing_success_secrets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/oye_como_va_percussion_ensemble.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/xijafomudaxarijexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/91610085653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/86871707391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/28510807423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/xugopekatafixolanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1946/4867/files/biblia_de_estudio_explicada_concordancia.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 3

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_off00006ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA7 5440 bytes
SHA-256: e786e1eeda5dedfcc2dafe071f741d168f7d41cc5f8a3db9c16d4a10325da4be
font_01_sfnt_off00008129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 9956 bytes
SHA-256: b7ad7884fda28e77cdbb4dd5928bc0f213b23dd218e6ab859b9a89e7712e4eba

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