Malicious PDF — malware analysis report

Static analysis result for SHA-256 618372dc5fbcf059…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 21:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2379f281f70fc1e2bd8d3fafacc4f38 SHA-1: 9a9e078eb7fbce7cf603eb58daf0bf63d2ed1ea0 SHA-256: 618372dc5fbcf059d31767d8abbb2346a38222425619d5d8ab8fb9e3fc68b8ca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed to host numerous PDF files. One of the primary links directs to a known malicious redirector infrastructure, indicating a malicious intent to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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=ffxiv+shirogane+map In PDF document text
    • http://files.missionographer.com/uploads/1/3/1/4/131437117/wudunuzuba_zaxixesubo_tujikod_zikesedegida.pdfIn PDF document text
    • http://files.thevintagebarntooele.com/uploads/1/3/1/6/131606343/3383442.pdfIn PDF document text
    • http://files.startuptosuccessmc.com/uploads/1/3/0/7/130738939/6211093.pdfIn PDF document text
    • http://files.gruffcorn13.com/uploads/1/3/1/4/131438137/9691198.pdfIn PDF document text
    • http://files.clairesanimalaffinity.com/uploads/1/3/1/4/131455141/kisemidasemer-kipilinej-fajadino.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/1/0436/9544/0040/files/megokisunena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7293/8399/files/xevotepetoruwokutuvojizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/noxuneji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2809/4882/files/sasuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/foriburalojubobebowade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/72757796449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7298/6015/files/89350690918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/zoxodekarodulefol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/90102266843.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_off000063e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E5 5368 bytes
SHA-256: 5b39f12ca051cc82be5985c3a1f227f80d7732c37941b8d7e91eca513f64f27b
font_01_sfnt_off0000760f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 9828 bytes
SHA-256: 847ac5dd1b4d0dadb607bec8f5a1cac60b64c7c55135395ae499a8cb1a765e1b

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