Malicious PDF — malware analysis report

Static analysis result for SHA-256 83be50dfd893c385…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 10:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0dc6666f99e3fa0c69e7ac322e9a700 SHA-1: 25ba54f63cbc095a0116cbd3886cdbc9fe24eff0 SHA-256: 83be50dfd893c3856d9e096d71ccef2147a354afbc7fba9874e9f48b46771542
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL and the document body text, though heavily obfuscated, point towards a lure for free downloads. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware.

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.cc/pify?keyword=chaupai+sahib+lyrics+pdf In PDF document text
    • http://lisijobe.ariverofnorway.com/uploads/1/3/1/3/131380429/8464837.pdfIn PDF document text
    • http://wexasizaw.lifepointeatwater.com/uploads/1/3/1/8/131871390/9240621.pdfIn PDF document text
    • http://files.2447w.com/uploads/1/3/2/3/132302892/zimifobik.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/1/0436/9963/4328/files/39887961636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/xenatuzunevajumixof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/19169751426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/payback_period_calculation_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3442/2941/files/pojiwoxowinije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/enviar_itinerario_amadeus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/the_anatomy_of_revolution_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/wilizegubiruzarovuzuduzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/25432554352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/sisasabovusedunoxepep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/rusawipu.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 1

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_off000063bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BF 5392 bytes
SHA-256: 6b4588d12d090cc817aa73bfb7b52b11bf79e008467655e47505c02fd0a22d4f
font_01_sfnt_off00007605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 9892 bytes
SHA-256: a70fe10d308c5315b8295261f4eff6fb4b02bd41c547b94c2fd7875641c86f1e

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