Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b720620624635e9…

MALICIOUS

PDF

46.2 KB Created: 2020-08-23 21:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00027f1c276744c1ab8e7e603ab917c5 SHA-1: da3a81c3f55d8674a7119a939a350db7a6c75dce SHA-256: 1b720620624635e91552402be8680817c0eceb4035a2bf010c47fabbbc5da34b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ice+cream+cone+coloring+sheets'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, and the PDF structure itself is the primary vector for the malicious redirection.

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=ice+cream+cone+coloring+sheets In PDF document text
    • http://tafise.storywings.net/uploads/1/3/1/3/131383651/wuxukujoxa.pdfIn PDF document text
    • http://files.ir-architecture.com/uploads/1/3/1/8/131857315/1652306.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/1/0428/1358/7623/files/6092494739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/tuvaferitarasurotamowijaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/marketing_strategy_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/chrome_os_virtualbox_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/gosaxopoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/guzebopuwixowej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/biblical_hebrew_grammar_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7640/2854/files/91076580735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/coloured_wrapping_paper_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/akbarnama_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/charcoal_briquette_making.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/2020_ashrae_handbook_fundamentals_si_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/pazekutuxojobape.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 6

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_off00007837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 5152 bytes
SHA-256: b51bd412852eb32b4197589fce212f624c7de32bc1329ff381810b38b5fab920
font_01_sfnt_off00008981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8981 10044 bytes
SHA-256: 64f0621822eb71b5dc98e83b7dd91d3b195f30af6da6ca0e838f3af6bdb3adae

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