Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1c1fb4c73e1358…

MALICIOUS

PDF

40.6 KB Created: 2020-08-11 09:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a72fcc436e73e2b82c060f95ee118d67 SHA-1: 295f1581b424f79350235f0320a041c38a4c3130 SHA-256: 5e1c1fb4c73e1358665eef3d7cc878948177d57675e31193b38903e8276497ff
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text, though obfuscated, contains URLs that are part of a link farm designed to appear as legitimate downloads. This suggests a phishing or scam attempt to redirect users to malicious sites.

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=noun+adjective+and+adverb+clauses+pdf In PDF document text
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdfIn PDF document text
    • http://popuzugo.f-c-f.net/uploads/1/3/0/7/130775062/905ede0bbe36d17.pdfIn PDF document text
    • http://files.gennieneumanlambert.com/uploads/1/3/0/9/130969300/tulufezi_mokovali.pdfIn PDF document text
    • http://files.essentialoils4people-n-pets.com/uploads/1/3/1/4/131453406/ligeno.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/1/0438/5731/3957/files/les_collectivits_territoriales_en_70_fiches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/87293742487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/vuxeduvor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/27676911088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/milevewejezosediwopubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/vowevuxofatofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/wanone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/fenosokejejemixiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/oneplus_bullets_wireless_2_manual.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 8

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_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5392 bytes
SHA-256: 0f08c96bb76f4ca25b252c44b908aa7400ada3ccb8c931976ca5c55cd71f84eb
font_01_sfnt_off00007424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 9784 bytes
SHA-256: c02fea2e574e49cef8535b06da23a894fe3ab78b0d45fcbb6a396d4f419abd8d

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