Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afe50757a6310ad…

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 03:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0381f5fdf1497f476a2416fd2ab78cdf SHA-1: 3949e1671d52fd0fca0f77343ca053d2e2a78940 SHA-256: 2afe50757a6310ad988bf8ca93937f54418bf09a732131072aa2fab93a43dd5b
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a critical heuristic identifying a malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'English grammar worksheets free pdf' and the malicious URL, suggesting a lure. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting the user to a malicious site via the embedded link.

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=english+grammar+worksheets+free+pdf In PDF document text
    • http://files.mjdsteel.com/uploads/1/3/1/4/131438567/3c02d9b8c9.pdfIn PDF document text
    • http://files.inthetote.com/uploads/1/3/1/3/131398424/9898084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/defensa_personal_israeli_krav_maga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/international_financial_management_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3071/6322/files/gomobekuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/vigagimefusulokosodala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/lima_barreto_cemitrio_dos_vivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/freelance_marketing_contract_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/19291321116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/18457522354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/7616637419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/pdf_editor_portable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/10806048916.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC7 5356 bytes
SHA-256: 202b1646542a8280e4756fd5293d35e12f0f50bb5cd6825b46f3e4ddbceefd0e
font_01_sfnt_off000080dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DC 10200 bytes
SHA-256: 7d6b8dcf0a7538c263b2001cb495424c6aa66c7a026a68c64226e62cf949c259
font_02_sfnt_off0000a397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA397 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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