Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ab669a5b3c411e…

MALICIOUS

PDF

52.9 KB Created: 2020-08-11 19:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e981d642086833ba4fa5a5a539fa866 SHA-1: 6559d423d12622ee7104091990813b069c4f7b07 SHA-256: 25ab669a5b3c411e542f3902b289667f4a292f20bab336cf1e249a9250c0c5b8
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc, disguised as a "wave equation example pdf". The ML classifier strongly indicated maliciousness. The document body is heavily obfuscated and contains the primary malicious URL, suggesting a lure to a malicious site.

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=wave+equation+example+pdf In PDF document text
    • http://files.nyelaw.org/uploads/1/3/0/7/130775014/4019074.pdfIn PDF document text
    • http://files.icarehomeschoolers.com/uploads/1/3/0/7/130740438/5973680.pdfIn PDF document text
    • http://boxezakot.413arearaconference.com/uploads/1/3/1/3/131379362/guvop.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/1/0432/2990/5058/files/gimikiratososefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/sotowukikusot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/73773506531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/puziwizojilelibuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/juzonife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/70429436426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/dosewonojuzag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4164/4963/files/20780784396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/69949457024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/ocean_avenue_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/88241575986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9994/7169/files/41692927057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/3707501146.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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_off00007ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 5180 bytes
SHA-256: aca0b25a372e5590c623da8d654680ee98a6817b709d3fac3c1d334a3fd95159
font_01_sfnt_off00008c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C77 10584 bytes
SHA-256: 1ffc36e85644ab96d56a92abe4469d84b55ebd6e4232397142a46a6fd092b75e
font_02_sfnt_off0000b0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CF 16288 bytes
SHA-256: b309b9dba5db20ace18897c0169c3606fd18eb4ce8af5ff148f7f3f389375a3d

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