Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7f290edbd4060c…

MALICIOUS

PDF

45.6 KB Created: 2020-08-10 05:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: caa8da174e059f744890c89c3b6bf596 SHA-1: 77ae3c799e11f3387dc57133132b8728cf61ffcc SHA-256: 8f7f290edbd4060c84571ff695830a8602523178b65130dca63086bf7a4a34df
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure and for containing a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=inteligencia+naturalista+caracteristicas+pdf' is likely part of a phishing or malware distribution chain. The document body contains obfuscated text and references to the wkhtmltopdf tool, suggesting it was programmatically generated to host these links.

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=inteligencia+naturalista+caracteristicas+pdf In PDF document text
    • http://wojaje.jamesdykman.com/uploads/1/3/1/6/131606289/f8fa83ad2fcd.pdfIn PDF document text
    • http://jodexomi.dartmouthcollegemsa.com/uploads/1/3/0/8/130813528/tepivuwolipotox.pdfIn PDF document text
    • http://files.futyfoundation.org/uploads/1/3/1/3/131398134/2c54c9fb8.pdfIn PDF document text
    • http://files.assembly2237.kofc.com/uploads/1/3/1/4/131437711/07286ab05.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/1/0434/5397/2630/files/pemazuronapukizumubir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/40615031620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/jinekizusologujom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/36731115263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/velejurivupojuvumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8301/4048/files/windows_7_pro_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/57428413480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/menewit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/44291502991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/34780415319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/85489255854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7607/5164/files/color_by_number_addition_and_subtraction.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_off0000735e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735E 5260 bytes
SHA-256: 7a85122645e918c207403ae3194609749dd6b50144cedacda6ac3ce1e34b459a
font_01_sfnt_off00008553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8553 11068 bytes
SHA-256: 676e7d72190bbac38c16e87d63163ab82c9d77ade4b0dd736cbf260a9fea2025

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