Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb3c74eed73e5df…

MALICIOUS

PDF

58.1 KB Created: 2020-08-21 19:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 676a6396f8244e074f05e4fc8678124d SHA-1: fecb6d8aaa5d685717ca0d4d5d88df9a1a7860e3 SHA-256: 3fb3c74eed73e5df7d49f88435dc0828207d0e078d4865635e6f529c565c8ae9
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it's a malicious redirector, linking to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same URL as the redirector. This suggests the primary purpose is to lure the user to a malicious site via the embedded link.

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.ru/pify?keyword=anatomy+lower+limb+mcqs+pdf In PDF document text
    • http://gisimo.gethealthyinitiative.org/uploads/1/3/1/4/131437736/8bdee07ead1.pdfIn PDF document text
    • http://wakizetep.dncministries.com/uploads/1/3/1/8/131856543/002887d792.pdfIn PDF document text
    • http://buzaruwe.jacktaylorphillips.com/uploads/1/3/1/8/131858661/vogitofipeveno-rujiwaledove.pdfIn PDF document text
    • http://files.winnebagocountyrta.org/uploads/1/3/1/8/131856725/bc43284fc.pdfIn PDF document text
    • http://files.sarahgadd.com/uploads/1/3/0/7/130775830/susipamu_lunuxara_kuwiwibawu.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/1/0435/3648/2458/files/lokagevefukudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/31376960247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/waxexeruwiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/69202853012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/nato_phonetic_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/10876287040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/chemistry_form_5_chapter_2_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/fevegawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/present_perfect_continuous_tense_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/xekewiguromotoboxisaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/kerowufatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7744/9366/files/13255766425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/tovexu.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 4

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_off0000a5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A5 5748 bytes
SHA-256: 79663c49f8d3a738be331ef73e2d289fa18798dbfff8f3e6ed304670305b02be
font_01_sfnt_off0000b922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB922 9972 bytes
SHA-256: ddcd5634fe9b4d7cde035ecf8416e723452597cfd01c9ee286d7663beacaffd8

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