Malicious PDF — malware analysis report

Static analysis result for SHA-256 820964be890ea06b…

MALICIOUS

PDF

44.8 KB Created: 2020-08-22 01:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59bd8250cab5e9e231fedb3005e2c069 SHA-1: eabdfad8460129c03938f6b1c98674a5df6ae166 SHA-256: 820964be890ea06ba8da7d552a2b37d25fb3cf04ff0a1d71833e4e1c7e5d075d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as legitimate document downloads, but the primary link redirects to a known malicious redirector. The document body and embedded links suggest a phishing lure for a legal dictionary, which is a common pretext for malware delivery. The ML classifier strongly indicates maliciousness.

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=black%2527+s+law+dictionary+pdf+online In PDF document text
    • http://files.palomarridge.com/uploads/1/3/1/3/131383791/8089584.pdfIn PDF document text
    • http://vakuwi.alamedhirudotherapy.org/uploads/1/3/2/8/132816202/dc9e388fcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7502/1474/files/sawusidop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/chirutha_telugu_full_movie_free_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/25599227962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/74916612159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5063/8229/files/jonathan_haidt_righteous_mind.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/58795478385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/legifeki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 5280 bytes
SHA-256: bf90e11a998e672de1fd6f85deeaf047b9ee662d15283d09a7d4db41218d2d18
font_01_sfnt_off00007418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 10896 bytes
SHA-256: 088f0e537a86abce818761cf4542698c9e1cdd8726fcedc81f6ed60e5fba1643
font_02_sfnt_off0000988d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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