Malicious PDF — malware analysis report

Static analysis result for SHA-256 826ba84f3c854a82…

MALICIOUS

PDF

60.4 KB Created: 2020-08-14 06:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88407cdc1c4396ade38fa6bd34b39ffd SHA-1: b07efeec7910bbc1a3137500befe31bdc7639769 SHA-256: 826ba84f3c854a8202a6aa86f04b7b76d0d038e5a669dfa686a1aa6105f5d81d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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/wb?keyword=iert%20entrance%20exam%20paper%202017%20pdf In PDF document text
    • http://zomaga.roadhousegrillandbar.com/uploads/1/3/1/0/131070786/9346604.pdfIn PDF document text
    • http://jipefizup.somdarts.com/uploads/1/3/1/4/131453060/9de1d9a06.pdfIn PDF document text
    • http://files.ornamentalmetalsmith.com/uploads/1/3/1/4/131437333/dbe2c0a793.pdfIn PDF document text
    • http://files.homeandschoolsts.org/uploads/1/3/0/7/130775806/5847462.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/1/0430/4211/1650/files/kujefagatiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/28996049487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1764/7766/files/47834521614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/mabamomafuzajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/dobakoruxate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/array_of_vectors_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/vejejajabisiridikoxukajex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2275/files/67516506675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/vofuwix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/36487636282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/65878059951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/enfermedad_de_chagas_colombia.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 3

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_off0000a7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BE 5504 bytes
SHA-256: 891296c65bc1afc454c9ce51fee1fb6ab6237a238c8815076fcb805454550145
font_01_sfnt_off0000ba69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA69 12856 bytes
SHA-256: e760f381ceccbb9125846da03349833a345055b15474ceceb44f044d1c06367f

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