Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29d28c781508dd6…

MALICIOUS

PDF

38.2 KB Created: 2020-08-21 23:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d23a1cf3f7ba90e3fcee57c2551043b1 SHA-1: aab1bc0e5a441e66b2985b69c35735998c187f5f SHA-256: a29d28c781508dd6ff66eddc3f88d6caa5591ebbaeae3ef47d1f74f22110166e
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This suggests the document is part of a phishing or scam campaign, likely using the 'worksheet' lure to entice clicks.

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=drawing+angles+using+a+protractor+worksheet In PDF document text
    • http://files.timelessskincarelaserclinic.com/uploads/1/3/1/4/131438460/ece84e1bb348ff.pdfIn PDF document text
    • http://gebodunal.haleylevy.com/uploads/1/3/1/3/131383483/ae3494986.pdfIn PDF document text
    • http://napaluje.sieglindemcgee.com/uploads/1/3/1/4/131407836/teteworazebinu.pdfIn PDF document text
    • http://files.clareandkatie.com/uploads/1/3/2/7/132710779/4982749.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/1/0440/7967/7590/files/ganisar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/gomamaduvufaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/college_ranking_us_news_and_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/71049665817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/terotelenasevisovukujuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/biblia_de_estudio_thompson_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/atul_prakashan_books_diploma_electrical.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6B 5232 bytes
SHA-256: 139833018687b3be246813cd0899cc1ac1102e1c32bd38ea075697a0fb3488dc
font_01_sfnt_off00005d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D42 9580 bytes
SHA-256: c6e68bfbb6d1fb8412dbf50950cf61275c915fff82103332b25bada0c84337fd
font_02_sfnt_off00007e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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