Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d63ef4acfc3aeb…

MALICIOUS

PDF

36.6 KB Created: 2020-08-26 13:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 226b63a39ab2eb14692d0208c5cb2d6b SHA-1: ef9998553120159c6d4281194595c109743e9bff SHA-256: 78d63ef4acfc3aeb2fb7bee728a0c9e4deeb96e9cd777d9ecb3a5244b0352134
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to distribute malware or phish users. The primary redirector URL, 'https://ttraff.cc/pify?keyword=problemas+razonados+para+segundo+de', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other links pointing to what appears to be a lure for downloading free books, which is a common tactic for distributing malicious content.

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=problemas+razonados+para+segundo+de In PDF document text
    • http://vesufomon.dominiquelegendre.com/uploads/1/3/1/4/131438216/3532910.pdfIn PDF document text
    • http://files.nirvanatails.net/uploads/1/3/1/8/131871849/484192.pdfIn PDF document text
    • http://files.acuartistry.com/uploads/1/3/0/7/130775471/bezosiruvugawijawov.pdfIn PDF document text
    • http://lopebuneg.catherinehertl.com/uploads/1/3/1/1/131164243/5455993.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/1/0428/5346/6271/files/fundamentals_of_bookkeeping_accounting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/8034/5750/files/o_reilly_python_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/brain_edema_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1898/4352/files/busqueda_y_recoleccion_de_informacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/banefidofekadozimodomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/21635047109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/ba_1st_year_geography_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/6813/2250/files/16451964523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6970/2305/files/ziligalodudebokixaromije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/pades.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/acquisitions_incorporated_d_d.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 7

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_off00004d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D90 5472 bytes
SHA-256: 79d677d37a050d27b78d0cf100dea6e506c83ae451c51d7fc3d967c2da90cf3d
font_01_sfnt_off00006009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 11080 bytes
SHA-256: 38a76d7fe962152fb104941deb35b6835d7369e4f67c2c5ec605a7853d43bdb4

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