Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b18db1a1b29cd84…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 17:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e4cfc177ee667fca14f1845d6f28221 SHA-1: bbda30fef78e3674336db32b6f7ac0d6e305a85d SHA-256: 4b18db1a1b29cd841a25ba514606440967d5e9befeb3b97d195cd0ee9756b70b
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.ru/pify?keyword=interjections+worksheet+for+grade+4'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0432/0978/5512/files/bugez.pdf'. The document body, though partially corrupted, contains the visible lure text 'Interjections worksheet for grade 4' and the malicious URL, suggesting a social engineering tactic to direct users to potentially harmful content.

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/pify?keyword=interjections+worksheet+for+grade+4 In PDF document text
    • http://givowo.suprimos.club/uploads/1/3/1/6/131607919/tesafobufepa.pdfIn PDF document text
    • http://files.hijoeselectronics.com/uploads/1/3/1/3/131383242/e270de.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/1/0432/0978/5512/files/bugez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/42837367816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/pokemon_yellow_gameshark_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4398/7357/files/32352302098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/movosizovibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/lonely_planet_london.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/gluten_free_artisan_bread_in_five_minutes_a_day.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/gerubisejefopizimep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/tricks_and_tips_to_solve_quantitative_aptitude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/aws_certified_solutions_architect_professional_dumps_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6936/4629/files/exercicio_de_botanica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5690/5885/files/kijebelajematidifudogixif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/72632518491.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: ourwildthings.co.uk 3 samples

Related samples 3

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_off000063e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 5508 bytes
SHA-256: 5eb1c294451f50e4e42abd762e4d3104a77dd82a1de521048197bd2d62e4b151
font_01_sfnt_off000076b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 10244 bytes
SHA-256: da75a589b13911673549531ce4400792b0d6190d337f9ae4bd965cf8269c910a

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