Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6931acbc18d8d54…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 03:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6bbae269c14ba6da573a82eda898d62 SHA-1: 5c88f68a6d20f7401e985c4bf6d65c778c50b8e8 SHA-256: d6931acbc18d8d54af1fb5e6e667d1346f7e1c727fdb91402ddf32ddecdc5ce0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to 'insulin sliding scale guidelines' but ultimately lead to a link farm designed to host further malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=insulin+sliding+scale+guidelines In PDF document text
    • http://files.tender4life-project.org/uploads/1/3/1/6/131637308/45a0f578.pdfIn PDF document text
    • http://files.broeifionydd.com/uploads/1/3/1/1/131163986/a66576.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/1/0432/5444/8286/files/oxford_dictionary_advanced_learner_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/28409007707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/tojiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/18581276060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2845/3288/files/adobe_acrobat_9_pro_full_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/zogejowuxawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/90145679407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/jidesogesajokipabal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/giulio_carlo_argan_arte_moderna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/rararutasuxusado.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_off00006518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 4948 bytes
SHA-256: 8da7d31402ab6c15c12009158e4b3923ce6d52bd296ca51c0c468ca501ddd149
font_01_sfnt_off000075f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F1 10224 bytes
SHA-256: 8ae7c62c09452e0d19b63d9c40c2eb91d17e5e716ec2edaff8e17aca09ec3d7f

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