Malicious PDF — malware analysis report

Static analysis result for SHA-256 5caf7664c6dc8791…

MALICIOUS

PDF

61.6 KB Created: 2020-07-31 00:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 068a1c1ffe7f15e27f4477888cfedaf6 SHA-1: 9038a5d7534c5f0e41d540ec37228c1c4202535b SHA-256: 5caf7664c6dc8791685f15409aa5888be62d18b3c0f656ba3960b4cb203f1900
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically 'ttraff.cc', which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'algebra 1 math worksheets pdf'. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm designed to attract traffic and potentially distribute malware or phish for credentials. The ML classifier strongly supports the malicious verdict.

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=algebra+1+math+worksheets+pdf In PDF document text
    • http://files.lakemacartstudio.com.au/uploads/1/3/2/7/132712119/mazakuwitelutag-duxibilaj-tijokalowi.pdfIn PDF document text
    • http://files.abelenepark.com/uploads/1/3/0/9/130969896/b929a4302d.pdfIn PDF document text
    • http://files.doggiedashabout.com/uploads/1/3/1/4/131438692/wemivivuzige.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/1/0435/6079/6318/files/72439773198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/banozotetese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3339/3309/files/rudezoxoxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/vesawalejilotanamafat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/rolufeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/47972315148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8147/2929/files/maputilugotoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29883534071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/kesekuvivarasoperu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/nafatiwekaxetafekej.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 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_off0000a92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA92F 5428 bytes
SHA-256: f53109aa9932394ad27896595bdaec1da139c94c9309f1653b81feca647d6c70
font_01_sfnt_off0000bbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB6 14240 bytes
SHA-256: c8574b94db0aad623a4f43b9c6da932cbcc5031d5a221403419dd4add5bb3adc

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