Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d43ce501d5f74e2…

MALICIOUS

PDF

41.5 KB Created: 2020-08-13 23:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eac82012d42df3b18dfc1bdcd287d802 SHA-1: f1c32888b56d81957dcea0f12aae47835db67c52 SHA-256: 5d43ce501d5f74e2adc3d735e564c3642bac251db3d224f441768801a0134e2f
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a deliberate attempt to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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=experiment+1+basic+laboratory+techniques+lab+report In PDF document text
    • http://files.iroiroproject.ch/uploads/1/3/2/7/132711954/553f7.pdfIn PDF document text
    • http://sepurama.liveitup4life.com/uploads/1/3/1/0/131070993/579961286c43.pdfIn PDF document text
    • http://files.50-50-50challenge.com/uploads/1/3/1/8/131872087/filomizape.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/1/0432/3062/5950/files/69297024240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8003/1139/files/binary_search_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7004/5864/files/nopuvekirinalonadupom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/19038382300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/data_warehouse_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/nidufene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/fubimufifitawaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/vidafexezomidaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/19871235142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/cambridge_english_advanced_practice_tests_with_key_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/fubopizonirosalelex.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_off00006184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 5616 bytes
SHA-256: 2470ffd6fa9c949c3efd6fd91a7aa08f6848725dbbb99dea3a870f19aad550f6
font_01_sfnt_off0000747b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747B 10712 bytes
SHA-256: 4bbf0fd098f313fedf5ea250b07470d93bcae5c69fffdf98a77cdea64729acfd

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