Malicious PDF — malware analysis report

Static analysis result for SHA-256 4845b8d7aa05dbb4…

MALICIOUS

PDF

50.3 KB Created: 2020-08-01 10:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f12292f5bfe1d695655a43b26bb68699 SHA-1: 340b132818ab09ca9a67cbc8bc284719e422b111 SHA-256: 4845b8d7aa05dbb43ed17e604efa2d84604491295d880816e59b6e02ca35fddb
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though partially corrupted, contains the string 'Jquery download pdf', aligning with the malicious redirector URL's query parameter. This suggests the PDF is designed to trick users into clicking links that lead to malware downloads or phishing sites.

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=jquery+download+pdf In PDF document text
    • http://files.galesgastrogrub.com/uploads/1/3/1/4/131453429/7127056.pdfIn PDF document text
    • http://files.southviewcaravansite.com/uploads/1/3/0/7/130775331/gejolarisawonib-mikajowul-xugomogura-solinijagofer.pdfIn PDF document text
    • http://files.macbma.net/uploads/1/3/0/8/130813528/81ae642f4dd32a8.pdfIn PDF document text
    • http://files.berwickpsychologyandhypnosis.com/uploads/1/3/0/7/130739385/bokezudizuzi.pdfIn PDF document text
    • http://files.echo-alpha.net/uploads/1/3/0/7/130738484/3845343.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/1/0435/6043/5873/files/67391720756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/josejiwamar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1942/6198/files/1838931867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/ligokaxizipomin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/wimujezuvoseroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/95260306600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/rawafujedavimix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/fitamuzuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/99846414934.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_off000078d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 5164 bytes
SHA-256: 2c58bd95410b7fa26dda08a8bd184cab60f2bb597aafe90af9b829aba56151ce
font_01_sfnt_off00008a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 15476 bytes
SHA-256: 5730cbce21fd04eff01639f108268be4aceade82d46b43bd0977ec1b7a70abe3

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