Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51543cc24ca06ec…

MALICIOUS

PDF

42.6 KB Created: 2020-08-11 20:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0d99dc8924364a74327f1665014df07 SHA-1: 3224df7f6de5a5de072308ecd9a06ab542a31f73 SHA-256: b51543cc24ca06ecc6e5e7f7fcfe8ddc84777464010d12b1f2753d9eb48ca657
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.com) disguised as a free download for AWS certification dumps. This indicates a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports malicious intent.

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=aws+certification+dumps+pdf+2020 In PDF document text
    • http://files.morriscountypca.org/uploads/1/3/1/8/131856276/pitibepufevuba_zezisori.pdfIn PDF document text
    • http://files.surprisescorpionsaz.com/uploads/1/3/1/8/131856068/42d566.pdfIn PDF document text
    • http://files.nwnna.net/uploads/1/3/1/4/131438708/03ca84ef0fa.pdfIn PDF document text
    • http://zezin.diluvioaz.com/uploads/1/3/1/6/131606349/7820785.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/1/0429/2270/5063/files/bamina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/kosevimanurepawagojurim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/46458996053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/gokisolomabixenusirina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/usps_zone_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/contoh_soal_akuntansi_perusahaan_dagang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6094/3258/files/maluzabirakebilokeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/24346864712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/addiction_treatment_homework_planner_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/99239364255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2023/7475/files/saint_petersburg_metro_map_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/catalogo_jequiti_08_2020.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_off000068dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 5624 bytes
SHA-256: 7f46772ff8b1009b5e3330552f1887e4a7db46bb6709c63f2dcd4d4cf70ea330
font_01_sfnt_off00007bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEF 9840 bytes
SHA-256: 53db5a2c9845579d0afb43d3c4ada513251f4926740d8efba226660afeace09b

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