Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c51cd4d236de759…

MALICIOUS

PDF

45.3 KB Created: 2020-08-20 21:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f6a837386f0edd74e03e00250df8af7 SHA-1: 55e79bae17e08cca93975f02db2fbcf9dfcc2faa SHA-256: 7c51cd4d236de759fa245ad02477c585a50abb040cff04977c04983e20f9622f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirector infrastructure, specifically `https://ttraff.com/pify?keyword=chicago+manual+of+style+footnotes+multiple+citations`, which is flagged as malicious. The document body, though partially obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content under the guise of a citation guide. The ML classifier strongly indicates 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.com/pify?keyword=chicago+manual+of+style+footnotes+multiple+citations In PDF document text
    • http://files.daltonwebly.com/uploads/1/3/2/3/132302970/woxerarowotibuk_kexowebedasifil_dizavujex.pdfIn PDF document text
    • http://files.enads.org/uploads/1/3/1/4/131406811/f7b796d3c7.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/1/0431/6508/9941/files/hook_to_load_checkout_scripts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/bigo_live_ing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/aprender_a_dibujar_rostros_realistas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2009/0517/files/welutalawawud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/desot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/gesoxovageme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/3725/5838/files/84977549903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/mewelama.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 1

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_off000072fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 5340 bytes
SHA-256: 70dfc43f380df4beffd9e66b97061f2599fbae001d4bbfb3dec75feea94dbc0f
font_01_sfnt_off00008514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8514 10320 bytes
SHA-256: ca774e18abb974f079e1d6194bc304ee8aae8c88920e60bdb366c38e7f14bd84

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