Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc221ad78ce98d71…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 02:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 814d5424e5577e391700b6fbdec60479 SHA-1: ff23a87ffd72a6f2210c2727dc2f890932573724 SHA-256: fc221ad78ce98d71c1427880ac01868880e48f58bbe4d1ba1181eedad9cda97c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Vocabulary for IELTS reading pdf'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=vocabulary+for+ielts+reading+pdf, which likely leads to further malicious content. The file also contains a large number of external PDF links, suggesting a link farm or SEO poisoning 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.cc/pify?keyword=vocabulary+for+ielts+reading+pdf In PDF document text
    • http://files.wkt.co.nz/uploads/1/3/1/8/131872021/fuzedurud_setulovanoku_voras_bigixijigoletik.pdfIn PDF document text
    • http://files.nicholsonflowers.co.uk/uploads/1/3/2/6/132681308/6400085.pdfIn PDF document text
    • http://files.thecottagebaker.net/uploads/1/3/1/6/131637194/zewogivugo-kubibimugitu.pdfIn PDF document text
    • http://files.absoluteripple.com/uploads/1/3/1/3/131398214/lagobezatoboxajep.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/1/0434/0737/6546/files/gagoxakelal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/gm_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/writers_workshop_conference_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/forever_21_job_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7663/0181/files/rubejimenurulokapalewuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/99842035204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/52969526570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/85699999419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36103472339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/62916354788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/nokugomaraliman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/asante_kingdom.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_off00006e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 5528 bytes
SHA-256: da3833740bb7b52ad0df75a2f94ae49fff356ec790e8d43796fa8cdf38af6305
font_01_sfnt_off00008168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 13504 bytes
SHA-256: 47695ae924f406a3be64c68342351f081fad715b000a7f930f9773d2f89ac624

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