Malicious PDF — malware analysis report

Static analysis result for SHA-256 3635c037db61c2ef…

MALICIOUS

PDF

34.1 KB Created: 2020-08-25 07:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea7e64599c7e60f65f9dd827663792da SHA-1: d05f3c00acece97614fec674631db79072af7682 SHA-256: 3635c037db61c2ef4d70c35cc00ceb6f0ba2930f596bcbc62c67c8c3c13a0f91
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded links, suggesting a link farm for SEO poisoning or phishing. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. No scripts were extracted, limiting the analysis of specific execution behaviors.

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/pify?keyword=roland+aerophone+manual In PDF document text
    • http://files.purrandpour.com/uploads/1/3/1/4/131437401/6713038.pdfIn PDF document text
    • http://sesaxig.melissasterry.net/uploads/1/3/1/4/131482952/5624286.pdfIn PDF document text
    • http://files.baak.ca/uploads/1/3/2/6/132683000/degafilofelan_bizikerilapepo.pdfIn PDF document text
    • http://files.sapientconsultants.in/uploads/1/3/0/7/130776200/50177bf.pdfIn PDF document text
    • http://nuzigitiv.nicoleedwardsauthor.com/uploads/1/3/2/6/132696021/tizafubeno-dunew-jugewutitetor-fisoginu.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/1/0434/4994/2176/files/munojukegawedozetivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/djmaza_audio_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/i_am_the_warrior_pat_benatar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/5566/3515/files/banking_awareness_bankers_adda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3634/4226/files/lumejobibijejiwinowav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/baumann_park_fishing_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/78107581057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9505/5766/files/tirajuxufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/historia_del_alfabeto_griego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/wafilebiwimusaz.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_off000048eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EB 5028 bytes
SHA-256: 9b0ecdacc217c70ed9a77dc09f2a7446ec5cffbba61de9ec2306803729caa4df
font_01_sfnt_off000059cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CB 9976 bytes
SHA-256: 75dad0d908414e820e1ab7afb15334c90d05c9ad5273bbac39923d94952e853c

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