Malicious PDF — malware analysis report

Static analysis result for SHA-256 83103057c184dcc2…

MALICIOUS

PDF

45.9 KB Created: 2020-08-09 20:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82a1e972856d85f20b3b84d7e82ad423 SHA-1: 4b7724fa7d9cfe26377bca0f0db434d274c2f6dc SHA-256: 83103057c184dcc2afc7cef2a9c2a2f0fd9f0ef57f79ba41954cb724710d4ea4
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a phishing or malware distribution campaign. The document body and embedded links mimic legitimate content, such as 'Ignou acknowledgement slip for assignment pdf', to deceive users. The presence of multiple external PDF links indicates a link farm strategy, likely to improve search engine ranking for malicious content or to obscure the final 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://ttraff.com/pify?keyword=ignou+acknowledgement+slip+for+assignment+pdf In PDF document text
    • http://files.mendedhearts117.org/uploads/1/3/0/7/130739093/bomaxugux.pdfIn PDF document text
    • http://vewekuduz.sanfranarc.com/uploads/1/3/1/6/131636612/1f3a5d.pdfIn PDF document text
    • http://files.larkandleigh.com/uploads/1/3/1/4/131409508/b636cc9eec4fcc.pdfIn PDF document text
    • http://files.davidwestphotography.net/uploads/1/3/1/4/131437330/rizawuxur.pdfIn PDF document text
    • http://files.whatsintylerspan.ca/uploads/1/3/1/4/131455475/mogefijami.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/1/0431/5312/9629/files/cpr_latest_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/78209001750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/virusud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/lusimiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/fetal_blood_circulation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/68815491665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/49953940494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8071/1325/files/zinidoxevivadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/camping_and_caravanning_club_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0214/8510/files/juniroxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/57436305668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/sedog.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 4

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_off000074b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 5568 bytes
SHA-256: 0f02e1e48304cc597a591fa573c1eee262002883a55277b8e7e9366052e343e5
font_01_sfnt_off000087b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B3 10244 bytes
SHA-256: 49cfba49eab0e4b58aad575b53e6d3faca6b09ead27fcf5365ce0966811caff3

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