Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef78d2ce60683412…

MALICIOUS

PDF

39.9 KB Created: 2020-08-08 05:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05072b66bcb58ef2afab1ca5cf0ec5d2 SHA-1: 5dd83a4b706bdd2ded77464c247caf6e4da481dd SHA-256: ef78d2ce60683412e25dd1ee5cde8a7d2a3bffd4aa187f060bf113c090df04bf
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=libros+budismo+theravada+pdf'. This suggests the document is designed to redirect users to potentially harmful content through a link farm strategy. No scripts were extracted from this sample.

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=libros+budismo+theravada+pdf In PDF document text
    • http://jatile.thereadingkeeper.com/uploads/1/3/1/3/131380213/c5ee0b746cc.pdfIn PDF document text
    • http://files.isdnetwork.org/uploads/1/3/0/7/130776786/8876992.pdfIn PDF document text
    • http://files.labellaglo.com/uploads/1/3/1/4/131453679/31148bb9de6c1.pdfIn PDF document text
    • http://files.ghecca.com/uploads/1/3/2/6/132681512/kifejikuzevotid-tupegenilofov.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/1/0429/5095/1066/files/mufitosowejatubomod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/tifagokiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/lowes_wichita_falls_tx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/satadif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/webmail_at_brightok._net.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/48233139006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/argument_writing_graphic_organizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/17251836258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/rodobufetijate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3703/8494/files/gusulevawuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6087/7729/files/restaurant_franchise_operations_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/10886311083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/temik.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 6

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_off00005e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 5392 bytes
SHA-256: cd70b07e2d2835a8cfa30fb075298c7d0e01e8cac2689d0492169da5fe6224aa
font_01_sfnt_off0000705b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 10024 bytes
SHA-256: bc381ff988dab1dc935ed0786389b58a371923387432f88ccc79772f3ac6deb6

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