Malicious PDF — malware analysis report

Static analysis result for SHA-256 33330b4ead52b95e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-13 21:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c94be6150c8d3944b4dec595cd816bc3 SHA-1: a4007b98ca1b67fcd96735c9d3910cefbd337769 SHA-256: 33330b4ead52b95e711c0518602155cd3c82701b29eee2844ffb8eec0dddcc4a
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded links, many pointing to external PDFs hosted on various domains, including a known malicious redirector at 'ttraff.com'. This suggests a link farm or redirection strategy. The ML classifier strongly supported the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated.

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=anonytun+terbaru+2018 In PDF document text
    • http://files.andersoncovehouse.com/uploads/1/3/0/8/130874124/3593010.pdfIn PDF document text
    • http://files.skylineelectricalmn.com/uploads/1/3/0/9/130970009/denojukewuf.pdfIn PDF document text
    • http://files.reederschurch.org/uploads/1/3/1/8/131856244/kinasuritegar.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/1/0434/0563/9836/files/kemetuzefepoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0806/1604/files/analytical_geometry_of_three_dimensions_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6553/9741/files/vemekepijuserevij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/30298893370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/catalogo_tradues_gold_hinode_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/58034390501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/4th_grade_math_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/89617525245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/41015473030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/makalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/mekefegedegevodofibiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kofuf.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 5

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_off00006332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 5220 bytes
SHA-256: d8f41992e59511ad70df8c9b0c2268a203abf369acbc764c3279f20f9ff17d8e
font_01_sfnt_off0000750a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750A 10844 bytes
SHA-256: 9e676119b271533bae120b91aad7939a46659285f58168147d59f3335d73aabb

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