Malicious PDF — malware analysis report

Static analysis result for SHA-256 e658d56f091ddbdb…

MALICIOUS

PDF

33.2 KB Created: 2020-08-12 12:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa37f6cb701ebae69893f2f7ac3efe63 SHA-1: ae7f58308acc2f7f12b83adbe8c8809051a8427c SHA-256: e658d56f091ddbdbb4f95853720c79a2909242a47b9f9be9fb24e796a57144a2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a primary link disguised as 'chemistry notes pdf bgcse' that redirects to malicious infrastructure via ttraff.com. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malware. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection campaign.

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=chemistry+notes+pdf+bgcse In PDF document text
    • http://files.canineandequineranch.org/uploads/1/3/0/8/130813458/548cd8167a6.pdfIn PDF document text
    • http://fajoj.crushblingboutique.com/uploads/1/3/1/3/131384429/fagov.pdfIn PDF document text
    • http://files.kuwaitikuwait.com/uploads/1/3/1/4/131437983/laxaxawijovu_sogamuvuj_limulapidozo.pdfIn PDF document text
    • http://suzimofu.coscinecreative.com/uploads/1/3/1/4/131453247/32e25e611d.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/1/0428/9835/8432/files/61411835552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5080/2081/files/ascii_values_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/6233509260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/wimafisuniniru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/guthix_d_hide_boots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/82216963145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/jumimowosuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/mirulomawibavajedato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/vovateborajizinum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/jomogipiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/vaxanuxexakuratotari.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_off000045c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45C3 5476 bytes
SHA-256: d32f59bd6b850601e1c13a90d357402b9568ce74932a6998cb8db47eefe0e517
font_01_sfnt_off00005841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5841 9400 bytes
SHA-256: 0b7dfe3138ecb57020a8c435180177dffa75ff75c6bf813a9a32d341eb92a776

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