Malicious PDF — malware analysis report

Static analysis result for SHA-256 b722a7b5714aca94…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 04:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 45200cc529b8b362368a833eb484ca13 SHA-1: c9038ef35c602e9e6747c2b9f5c7ab2142d6fb2e SHA-256: b722a7b5714aca94250fecda16f4af0b269115ca1135e2aff6a3015b36aa938e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=ejercicios%20palabras%20compuestas%201%20eso%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to potentially suspicious domains. The document body, though heavily obfuscated, contains the same malicious URL and other URLs that are part of the link farm, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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/wb?keyword=ejercicios%20palabras%20compuestas%201%20eso%20pdf In PDF document text
    • http://files.teamwoodsblitchfishing.com/uploads/1/3/0/7/130775126/e6902540bbba6.pdfIn PDF document text
    • http://files.wildwrx.com/uploads/1/3/2/6/132681476/ziluvura_tasizufevuxudi_gupogemi.pdfIn PDF document text
    • http://files.suemesserstudios.com/uploads/1/3/0/7/130739275/7436a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/widening_joints.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/72768557501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6800/3228/files/lupodajelisuxibaxinagus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/99202471815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/30299870621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85484739365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/spoken_english_lessons_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/vugododota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/nogaruzasipaberexujobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/tazekivat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/1993_ford_ranger_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/wesofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/dodujurapufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/88379697444.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5126 5304 bytes
SHA-256: f1687a0c8ca992412c2ca044f01d23812451493af3b4978227e3744d04db509c
font_01_sfnt_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 11216 bytes
SHA-256: 35258607276e556569530374be3b3cf1b13ead75218dfef0f392a5306860ef2a
font_02_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c