Malicious PDF — malware analysis report

Static analysis result for SHA-256 8666039f71467ff5…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 19:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb10090bfa6d651c20e78376092f16d8 SHA-1: c8f61178d32923ab92ced30b842eb232c1f052ce SHA-256: 8666039f71467ff54d6d418abff876a9af9bcc1b6c5af81178db38af56f666e1
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate educational content, but it redirects to malicious infrastructure. The primary redirector URL is `https://ttraff.cc/pify?keyword=english+test+for+3rd+grade+pdf`, which is flagged as malicious. This suggests a phishing or scam attempt, likely using social engineering to trick users into clicking the link. No scripts were extracted, but the PDF structure and embedded links strongly indicate 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.cc/pify?keyword=english+test+for+3rd+grade+pdf In PDF document text
    • http://files.puristaromas.com/uploads/1/3/0/9/130969505/nexero.pdfIn PDF document text
    • http://files.twfermco.com/uploads/1/3/0/8/130874566/3114318.pdfIn PDF document text
    • http://zurax.sjbcatholicschoolredbud.org/uploads/1/3/0/7/130740178/b97f79c.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/1/0433/0687/7080/files/sutapazuvonovojikujabera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/bosewabewugum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/sapply_vs_lapply.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/seniloduzoxujerefona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0332/8150/files/mc_helicopter_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/78._8_kg_to_lbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/korelesedokarifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/crown_vic_manual_swap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/60342382343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/2741561757.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 4

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_off00006163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6163 5424 bytes
SHA-256: 7acc330b093fb0d202fb1a8096bfcaea7668f097182c1f98cbeece2c096083ac
font_01_sfnt_off000073d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D4 10476 bytes
SHA-256: 995d91571647cdd17fae2791cff9c66c5c080ad0f91959b93cfd69c823ef4b68

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