Malicious PDF — malware analysis report

Static analysis result for SHA-256 6843d226516fbe01…

MALICIOUS

PDF

38.3 KB Created: 2020-08-14 04:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 255ba179b69d92c7360e6d40a9ed946d SHA-1: ca67f3b2d5ce6340781a4ad640e7d6dae68d710d SHA-256: 6843d226516fbe016f8df8b1d443986b2ba4c5f9ebd0362d391b9f29abb025e9
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body text and embedded links attempt to disguise the malicious intent by appearing to offer educational material. The ML classifier strongly indicates maliciousness, and the overall structure suggests 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.cc/wb?keyword=important%20general%20knowledge%20mcqs%20with%20answers%20pdf In PDF document text
    • http://files.touchstonerunes.com/uploads/1/3/0/8/130814682/2438729.pdfIn PDF document text
    • http://files.roadwaysport-n-trailer.com/uploads/1/3/1/3/131382470/4444440.pdfIn PDF document text
    • http://najokaje.fossilschools.com/uploads/1/3/1/3/131384281/sasemalali-bekisutimabuma-mibese.pdfIn PDF document text
    • http://files.lcanavigators.org/uploads/1/3/1/0/131070152/84f04.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/1/0431/7013/6230/files/pinugetewoxure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1147/9464/files/drug_abuse_essay_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/95438473158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/notifoxopog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/zebiwifizokudixaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/teddy_ruxpin_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/ryobi_4_cycle_weed_eater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/absorption_spectra_of_photosynthetic_pigments_lab_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/nodejimowixowoleroga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/jagisasalogosezabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2814/2485/files/netflix_stuck_at_24.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/garmin_nuvi_200_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/skyrim_familiar_faces.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
🗂 Part of campaign: brigidvidler.com 6 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55DC 5788 bytes
SHA-256: 1ab1086fbd1da7bb67caac9b9fe5256086cee940530449bdf0f0d5b2faf221aa
font_01_sfnt_off0000695d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695D 10144 bytes
SHA-256: 60747cfc261b1d65af141107a7976bed43460ca051708c6143585bdb80b2793d