Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c7d94e1a9ff9d0e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-15 05:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0081de468ad07316b349ca99e28882e9 SHA-1: 1da8c559e9d1defe8f1b31a09cec1495776db91d SHA-256: 4c7d94e1a9ff9d0e5119d3d4fac682713e7f0bfda1f5b044e12f538d4c5a1ed6
194 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many pointing to Shopify domains, but also includes a critical link to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wb?keyword=past%20tenses%20mixed%20exercises%20pdf%20with%20answers', reinforcing the malicious redirection attempt.

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/wb?keyword=past%20tenses%20mixed%20exercises%20pdf%20with%20answers In PDF document text
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdfIn PDF document text
    • http://files.dutchtasmanianconnection.com/uploads/1/3/1/4/131413718/4a553d.pdfIn PDF document text
    • http://files.abigaildance.com/uploads/1/3/1/8/131857562/406848ad0.pdfIn PDF document text
    • http://pidotamet.oregonmade.org/uploads/1/3/1/4/131438800/492a368.pdfIn PDF document text
    • http://taruvini.duboispsumetz.com/uploads/1/3/2/3/132303382/tipuku.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/1/0430/1992/7713/files/bozafomuvefivatupovifof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/zutavunus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/best_free_ipad_app_for_annotation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/queen_s_gambit_variations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/hp_1536_dnf_drivers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/zenojib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/mabisamerorezodesotuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/41505986398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0214/9540/files/antonyms_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/manuale_domotica_bticino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/dipebelarawowufuwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/bertrand_meyer.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_off000051a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A8 5524 bytes
SHA-256: c36ea8077034e7e0d4754601240470c5efc74b0cbcb47e33fe8f2c71684172bd
font_01_sfnt_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 10052 bytes
SHA-256: 094ce847b20a5095ab18b86f2406ada9685b55451b0be9df46f83c36c9c21a4f

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