Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fe84615862dc90…

MALICIOUS

PDF

39.9 KB Created: 2020-08-05 06:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b77883d771c33a659c7d2e6e76f14bb SHA-1: 5061a6f219a1dbb3cf13629eb6f196f5f2bc979a SHA-256: 62fe84615862dc9095bc547e9b22d6db135ecc761fa3848d9eb3789391b57173
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing attempt. The primary redirector URL, https://ttraff.com/pify?keyword=waterfall+model+tutorial+pdf, is flagged as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting it's the intended lure. The ML classifier also strongly indicated maliciousness.

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=waterfall+model+tutorial+pdf In PDF document text
    • http://files.greenfield-bilingual.com/uploads/1/3/2/6/132683001/devixabubutitesopo.pdfIn PDF document text
    • http://jenad.ktgphd.com/uploads/1/3/0/8/130814297/fc5bbde1e296.pdfIn PDF document text
    • http://files.singingforfuncrowborough.com/uploads/1/3/2/6/132696274/mifetonuwarozo_xikofakesazofax.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/1/0433/1149/7366/files/18884675067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/71411814739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/analytic_hierarchy_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/92888033041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/47636475081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/18374151756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/92854956065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/pikudakidodipa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 5020 bytes
SHA-256: bf4deeaa00ce2c65ecb33076cb6da13f071b5c83de4840f76c7de301eda9d82b
font_01_sfnt_off00007145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 9972 bytes
SHA-256: e31acdea34b9c0d638d7bf36283e069b69ca77de0b781905f1850b8e6b1e5869

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