Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c1b661c6af3b6c…

MALICIOUS

PDF

36.3 KB Created: 2020-08-25 05:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2cb5a099a9da105fb2815a461de7db8 SHA-1: b58490a70091bd5ad8ce39b1a9d60dd2200f23fb SHA-256: 28c1b661c6af3b6c967cdb03443700ed979831b278faf4041edcfeec32747be5
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure for movie downloads. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=avatar+2+dublado++utorrent In PDF document text
    • http://files.optimaot.com/uploads/1/3/1/6/131637104/kojivaxigivesuler.pdfIn PDF document text
    • http://files.jlwarfieldministries.com/uploads/1/3/1/8/131858287/5173616.pdfIn PDF document text
    • http://pufare.wall-in.com/uploads/1/3/2/6/132696067/guwidotajagipigadi.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/1/0434/1773/1229/files/27266333824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/be_with_you_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/camarines_sur_national_high_school_uniform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/27709821676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/mipibulavozotexaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/arqueologia_del_saber_michel_foucault_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6244/1637/files/jajixekobarowerenepot.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6B 4960 bytes
SHA-256: 2585fbb0cf174870d581afef1a0c503023b9f96517ae8e8e4a819723aa0ac921
font_01_sfnt_off00005d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D57 12396 bytes
SHA-256: 8c4b75422289b07f3d6db49b8ed24ff3873da3f0b25a523b681539ff4f87bbfa

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