Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbe90456b56d9f3…

MALICIOUS

PDF

52.2 KB Created: 2020-08-09 06:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91ac93a04b519572d864ebc1319f05aa SHA-1: d43f3fea3bb83d460c2d1edc1446b7e763a9f4e7 SHA-256: 4fbe90456b56d9f36eff7fa1c4e69abba452a3062cc26b9a2b566af258f533ad
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO spam or to redirect users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=ciencia+ficcion+libros+pdf+gratis'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure for free book downloads that ultimately leads to 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.com/pify?keyword=ciencia+ficcion+libros+pdf+gratis In PDF document text
    • http://files.iepconsultingwithcatherineevans.com/uploads/1/3/1/4/131483361/b25e389e4251.pdfIn PDF document text
    • http://files.lovelylemonco.com/uploads/1/3/1/1/131164075/7569283.pdfIn PDF document text
    • http://files.fatbellybassmasters.com/uploads/1/3/1/4/131406372/tuxilebobugeme_badav.pdfIn PDF document text
    • http://files.sirpapaivinen.com/uploads/1/3/0/9/130968984/aabb96.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/1/0433/5009/8085/files/28249130037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/o_que__materialismo_histrico_dialtico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/organic_chemistry_2nd_edition_david_klein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/48132039648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/69886050956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/zetidorogubifomabibenuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/56861446930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/fepopugigeperop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/19692877123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/guzadusimolexex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/jowag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/10229721515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/nozatenag.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 8

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_off00008b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B33 5368 bytes
SHA-256: a80953ee64fc8f41f249067bd0d7b81b67bc7ebf84f742fdba1979154db7d3e7
font_01_sfnt_off00009d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7C 11204 bytes
SHA-256: e0bfeb71836c737225c896722e5107e6bf214b48e96c9f4321e4b62986fa8c64

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