Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b4ccff249a3dda…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 05:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 342b8678c5373371be2d7d09c4949e97 SHA-1: 2cd322f9974f4eae965b64ce9c0f2c8d699dc3f8 SHA-256: 96b4ccff249a3dda69e8dc6e9b424bf3fbde84fbb0ce62d6b213d405f8ddf439
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The embedded URLs, particularly the one pointing to 'ttraff.cc', are indicative of a redirection chain likely leading to a malicious site. 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.cc/pify?keyword=drano+lake+fishing+report+2018 In PDF document text
    • http://sijel.projectechelon22.org/uploads/1/3/1/3/131383737/kefuf_kodiwokituson_lajeka.pdfIn PDF document text
    • http://files.rightagri.com/uploads/1/3/2/6/132682976/3282404.pdfIn PDF document text
    • http://files.topfalcons.com/uploads/1/3/1/1/131163705/7116d.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/1/0430/8962/5241/files/68277357840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jokuxotusexoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/meremomubezuxurapulufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/apostrophes_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/denopuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/99729939854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/xajejuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/96054384394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/45236599805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/90481382168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8017/9109/files/xevukiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/14569200274.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_off00005a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A93 5744 bytes
SHA-256: c428e8809af5f3c0f3625c9f313b0b93f814255ab7027d5ebd985d7aada71522
font_01_sfnt_off00006e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E28 10244 bytes
SHA-256: ee7a5c9b629b85008fc360e732c93173368b86865ca8a3ee0e4ca068c266d30f

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