Malicious PDF — malware analysis report

Static analysis result for SHA-256 959ce5a395f5f85c…

MALICIOUS

PDF

46.4 KB Created: 2020-08-09 04:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 221f260c19373ced3cef94563ec3edf6 SHA-1: f1e374c33ed77b7437252267c9ffe1c40dacd432 SHA-256: 959ce5a395f5f85cbc71e0e5dda5a75ed2a80f84e489a0b0dad285e2e9a7e976
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely designed to manipulate search engine results or redirect users to malicious sites. The ML classifier strongly supports the malicious nature of this document.

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=etymological+dictionary+of+the+hebrew+language.+pdf In PDF document text
    • http://files.edmondpiano.co.uk/uploads/1/3/1/8/131856815/xilagimisuvigupasa.pdfIn PDF document text
    • http://files.calmbabymassage.co.uk/uploads/1/3/1/6/131636807/2976619.pdfIn PDF document text
    • http://files.queencitydoulaco.com/uploads/1/3/2/6/132682745/466abf831e84.pdfIn PDF document text
    • http://files.nwoliveclinic.com/uploads/1/3/0/8/130814133/kigodolenakaji_zofufipaxaf_pitidabipuxaro.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/1/0429/0910/6335/files/bunebilidapesabafowoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/kijovuwenugorulomarizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pubasujarudewuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/67254392965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5277/7128/files/bulapakugek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/tudozorurur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/28837297329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/kelainan_metabolisme_protein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/stochastic_geometry_and_its_applications_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/kerulazonuluzaxowotezuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/xafaxeguvowosipal.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 5

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_off00006c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0F 5716 bytes
SHA-256: b60777476053258a4a597755af82fb1f24e8cbf1bb62286699c070b624442433
font_01_sfnt_off00007f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 12552 bytes
SHA-256: e9c5b570702895b211b617034fbba0c3e564bcfc61f1583911ca23dc0ee9c88a

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