Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0604a16706a476…

MALICIOUS

PDF

39.3 KB Created: 2020-08-10 04:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0ffa6496678308e5364426bc12feb19 SHA-1: 95ae58295a53394779bc660f80bffd6b1e4ffbbd SHA-256: ff0604a16706a4764eaa6329768c16507015361f27d49e422b144b8ca3c98526
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=phonics+test+for+grade+2+pdf'. Another critical heuristic identified a large number of external PDF links, suggesting an SEO link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the malicious intent.

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=phonics+test+for+grade+2+pdf In PDF document text
    • http://fininexi.eraindianocean.org/uploads/1/3/0/7/130739625/a40180015fbb02.pdfIn PDF document text
    • http://files.well-estar.com/uploads/1/3/1/6/131637034/91a0067.pdfIn PDF document text
    • http://files.themamalounge.com/uploads/1/3/1/6/131636914/wokalelevupam.pdfIn PDF document text
    • http://vuribuxo.thelashqueenofregina.com/uploads/1/3/2/7/132712207/2444832.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/1/0440/5939/4213/files/69268395710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/loloridad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/honda_rebel_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4640/files/network_management_administration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/16218215039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7784/3609/files/duluresisafumuruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/jenamoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1117/7639/files/wekowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/gukivilebudorogugan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5380/4694/files/chung_probability_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/55918234555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/fusupezizejazamimumezov.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 8

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_off000050fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50FC 3144 bytes
SHA-256: c1b6cc2346db215f1bb370fecda082b642f0c720a5a39cca9f2bcd3b41fe938f
font_01_sfnt_off00005c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1E 5520 bytes
SHA-256: 8ff39773dfdfc111507650725c59d3baaff80576ec268a198657cc9bc6b16bf3
font_02_sfnt_off00006ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE0 9660 bytes
SHA-256: f6449a7858fc21723b71ac1b3147785dc82c31dbb76410ab3ed9e2a3ca41ecc9

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