Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b27ceffdda9682c…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 05:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70b03b1caa16bc4be4e0484ab9c391a0 SHA-1: 28cea421dffa321a5a73323ae6c09b4796166f61 SHA-256: 4b27ceffdda9682ccaa05042ffeeb3754cc7e479a28a2cddb6e17cf853b2d618
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, indicates a lure related to '4th grade math word problems worksheet pdf'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The primary malicious URL identified is ttraff.com.

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/pify?keyword=4th+grade+math+word+problems+worksheet+pdf In PDF document text
    • http://files.nuyounutrition.com/uploads/1/3/2/6/132681617/xugekoda-wurefubozaganaf.pdfIn PDF document text
    • http://files.alanurbanhomes.com/uploads/1/3/2/6/132696104/1120979.pdfIn PDF document text
    • http://molasaj.waywardcompass.com/uploads/1/3/1/4/131438641/kanutor-verabuwo.pdfIn PDF document text
    • http://files.cedarviewbaptist.com/uploads/1/3/1/4/131408103/2324900.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/1/0433/6300/8661/files/54224393918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/suwaruzol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/bowab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/sir_arthur_conan_doyle_sherlock_holmes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/edema_agudo_pulmonar_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/acer_aspire_one_d250_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/97851715296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/tatogezezozobaveku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/customer_behavior_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3956/2651/files/49687046118.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_off000070c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C4 5744 bytes
SHA-256: 38d1fa478a3cba5d6096f7ce5513b17d28cabb4096e4de4e5e7475b671bec2d1
font_01_sfnt_off00008434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8434 9772 bytes
SHA-256: a2f844f1478b86698bc016aeaa7bd1364906020a6e1f18146d925666b012de54

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