Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3dc5af925d6a46…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 19:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e8a63b2ac76638dcabf29311aa95883 SHA-1: 5a96ca48aa70c4f7fe99e302cc9d5c9142283451 SHA-256: 6f3dc5af925d6a46b4631f0622de52ab47e210a8c9aeb73d48c67217e2955656
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious SEO link farm, masquerading as printable worksheets. The primary redirector URL is `https://ttraff.ru/wb?keyword=abc%20tracing%20printable%20worksheets`. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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.ru/wb?keyword=abc%20tracing%20printable%20worksheets In PDF document text
    • http://files.12chemistry.com/uploads/1/3/0/7/130739143/novutejizikojekuv.pdfIn PDF document text
    • http://files.slosymposium.org/uploads/1/3/0/7/130739369/pibabulibogo.pdfIn PDF document text
    • http://files.sebastiancurrier.com/uploads/1/3/0/7/130740571/7755106.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/1/0438/1740/2530/files/e-_40_my_ghetto_report_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/wuwer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/animals_maroon_5_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/69583893186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/togadesiwukog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2131/1898/files/74268886635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/1697610765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7632/8355/files/jaxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/metabolic_acidosis_in_ckd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/9352868121.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 5

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_off0000629b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629B 5480 bytes
SHA-256: cf7f885e026dc86a4c6ccc7c397cfdc76e81dc8fb72e5f9d3244330dc9bcfe08
font_01_sfnt_off00007540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7540 10328 bytes
SHA-256: b7790159bb3ae90e167170ab7dbdea54b47a167c0d9f505301ab22663d2ce774

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