Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ae8c91b70d3325…

MALICIOUS

PDF

35.9 KB Created: 2020-08-19 13:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9324453fd9b84bb8a4dde22606e1546 SHA-1: affb0fd3d4a331133305bdd0bc01e6e8daf8caab SHA-256: 66ae8c91b70d3325f0a26c8be4ea446e045dc35d62c1b1a5d73870c8c42c48a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.com). The document body, though partially corrupted, suggests a lure related to educational content ('Conjunction worksheet for 4th grade'). The presence of multiple links to external PDFs, including benign ones on Shopify, combined with the malicious redirector, indicates a likely attempt to lead users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the 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.com/pify?keyword=conjunction+worksheet+for+4th+grade In PDF document text
    • http://files.patersonsland.co.uk/uploads/1/3/0/8/130874238/baguzemi.pdfIn PDF document text
    • http://files.carvoeirogcc.com/uploads/1/3/1/4/131406736/a3a2b74a.pdfIn PDF document text
    • http://wuralur.gavanw.com/uploads/1/3/1/4/131410685/1797382.pdfIn PDF document text
    • http://files.relationship-lab.com/uploads/1/3/1/3/131384286/lutufidonurul-laveligifu-tivag-nevegibegetow.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/1/0432/0002/0635/files/zilokidamexezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/bharat_gas_new_connection_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/redemoluzomitetas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/bowegafazupumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/pdf_file_to_jpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6828/4316/files/yung_joc-_hustlenomics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/wegone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/sikiroxuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/fagoxoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/65474737852.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_off00004e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E75 5476 bytes
SHA-256: 467b4fdc4f626db1c22bfd7f1ed8b723ce7d395439d98568d373b0943735cf4c
font_01_sfnt_off0000612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 9844 bytes
SHA-256: 2a463f29616b1ded786d4600f331287e5f6616a19054d2844010c6173ff3a74b

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