Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1cac2073b454b2…

MALICIOUS

PDF

39.2 KB Created: 2020-08-05 04:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec2d0b2ffc536a4e164f6ca83eeb49f1 SHA-1: 84c47e2b3458c09e033723641e4379efab6c8354 SHA-256: 6c1cac2073b454b27fcaecc8106ef5f0b2c9ff270cd662dcb20f7b7ff77ef1a9
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a malicious URL, disguised as a search result for educational material. This technique is commonly used for phishing or distributing further malware. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-optimized links to potentially malicious content supports this assessment.

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.cc/pify?keyword=8th+grade+social+studies+textbook+pdf In PDF document text
    • http://files.duganspecialties.com/uploads/1/3/0/7/130740316/ead497249.pdfIn PDF document text
    • http://files.belfastdrivered.com/uploads/1/3/1/3/131382274/wexamotovonezit-pabelirenakexo-robuniwobunoru.pdfIn PDF document text
    • http://files.next-cya.org/uploads/1/3/1/1/131163872/zeluju.pdfIn PDF document text
    • http://files.myplanetink.com/uploads/1/3/1/1/131164476/7200166.pdfIn PDF document text
    • http://files.theatelierschool.com/uploads/1/3/1/4/131408528/3414551.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/1/0440/8338/0376/files/52056479894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/wiper_blade_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/blue_jackets_manual_20th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/lixasinox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/jezasose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3513/1036/files/bernhard_riemann_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/bobcat_610_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4931/9577/files/math_games_for_adults.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/lewofomida.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_off000056b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B8 5788 bytes
SHA-256: 142d2401087a1fb5a9a2cbea5e438be184d26c407624779f8dd77c9a941684ca
font_01_sfnt_off00006a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A64 11368 bytes
SHA-256: ab63b862376c77afa2ee9e3b8aa75b1dbfa91d340e2b3e2697f182b3fe53189f

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