Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3031d45f386911…

MALICIOUS

PDF

51.0 KB Created: 2020-08-15 10:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac98c6faf4daac2df0858f7ce47e2a81 SHA-1: 09110eb8a1331c21de88cd4ea70c2d39ce5e39cb SHA-256: ad3031d45f386911316955e47ed93c7e42beb7d4aa140bee50a61547cc86126a
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wb?keyword=ensayo%20sobre%20el%20aprendizaje%20significativo%20pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to lure victims.

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.ru/wb?keyword=ensayo%20sobre%20el%20aprendizaje%20significativo%20pdf In PDF document text
    • http://files.elisafriedlander.com/uploads/1/3/0/7/130775970/3087793.pdfIn PDF document text
    • http://files.chrisminamyer.com/uploads/1/3/2/7/132740553/7035012.pdfIn PDF document text
    • http://files.smoochespooches.co.uk/uploads/1/3/2/7/132741334/1723023.pdfIn PDF document text
    • http://files.partiesnpresents.com/uploads/1/3/1/6/131606552/a2bea4d232.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/1/0434/2117/1873/files/dixegifavujokuvis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/67400778737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/round_rock_weather_radar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4375/0039/files/back_pain_exercises_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7044/5982/files/bsf_form_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/37495053905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/drawn_together_uncesored.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/8115760795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/bihar_hindustan_news.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5539/8563/files/paredipinimozavuzudatoxi.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_off000086c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C4 5708 bytes
SHA-256: f22866debe7fef7fef40928583edbb858e6357aa4e39ee68b04174e6aa6b03c3
font_01_sfnt_off00009a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A52 10780 bytes
SHA-256: 65421da92a6b2c6195d6dba2c39501a716451afa4fb71798b651da12074b3777

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