Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d4bf57e3b2bef8…

MALICIOUS

PDF

45.0 KB Created: 2020-10-10 00:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb622f80741b7de14f67498be72567ec SHA-1: 419d33484aa2ad4a8bc159e2ce8708391c590828 SHA-256: 83d4bf57e3b2bef8907ca44c815b826bd1cba6568062f616858fc115841a4dc7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the primary malicious redirector. The presence of numerous PDF links, many pointing to Shopify domains, suggests an attempt to obscure the final malicious destination.

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://ggtraff.ru/strik?keyword=tape+diagram+definition+math In PDF document text
    • http://kasagad.lokakuunliike.com/uploads/1/3/1/6/131606162/rorubisulo.pdfIn PDF document text
    • http://files.paolobenegiamo.com/uploads/1/3/1/3/131380555/xejuxivejefolor.pdfIn PDF document text
    • http://ludek.aubreylloyds.com/uploads/1/3/0/7/130775389/3523938.pdfIn PDF document text
    • http://nosuvogux.kitchen-envy.net/uploads/1/3/2/6/132695829/vafivu-turofime.pdfIn PDF document text
    • http://files.asapsperry.com/uploads/1/3/1/3/131379183/4268140.pdfIn PDF document text
    • http://tonow.oldschoolsailing.com/uploads/1/3/1/6/131606295/zonijitekojo_xasonitamet_gilapuzenilekev_muraf.pdfIn PDF document text
    • http://files.interculturallanguageservice.com/uploads/1/3/2/7/132740405/lifidefarajalurivox.pdfIn PDF document text
    • http://zaxuxoro.immortalizedimage.com/uploads/1/3/1/3/131380485/dorup_fegixadoviratul_vudowajabavose.pdfIn PDF document text
    • http://files.theunreached.blog/uploads/1/3/0/7/130739713/8057dccda1ce439.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/1/0428/4416/0156/files/kevamulatukivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0786/8579/files/king_ecbert_died_vikings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7357/6865/files/98126296957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/polawasebemab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/mixcraft_8_free_download_with_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3222/6203/files/ispconfig_manual_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/naked_genetive_latin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0468/9558/files/82435893179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8777/6930/files/3651582275.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_off00006fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD3 5196 bytes
SHA-256: 595f5f82876beb3dd62e900fdf0d5a9317ed00efe62f6c376117035b5ee9df62
font_01_sfnt_off0000815c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815C 10908 bytes
SHA-256: fe00011896ddeff1d37f9803bc070bb6f89a90e60d5fda10da70803fb99adfea

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