Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2025bee0539f8db…

MALICIOUS

PDF

41.4 KB Created: 2020-08-13 12:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83b7cb99440e5b9cfa1e6df08cfface1 SHA-1: 8c837f24446c186d738c4b1f582ffe559a590f9f SHA-256: c2025bee0539f8dbf6f5ba86888aea32de828d930b05c2fcb6fce41753d70b3e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/wb?keyword=electromagnetismo%20pdf%20unam'. This indicates the document is likely a lure to redirect users to malicious sites. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute 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.ru/wb?keyword=electromagnetismo%20pdf%20unam In PDF document text
    • http://files.vintagetoycorral.com/uploads/1/3/1/4/131453348/pojajexiran.pdfIn PDF document text
    • http://files.jacks-cottage.co.uk/uploads/1/3/1/4/131409309/0ea9bf.pdfIn PDF document text
    • http://files.ausdiagnostics.com/uploads/1/3/1/1/131163738/rakorodakizoxir.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/1/0431/6417/2445/files/88199462070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/pixovetodak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/36741646331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/31825642447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8567/4149/files/jesinorovuvozemedarot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/52045548383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/61192252490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/kevisexigovawebelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/32088716206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/zedeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/caracteristicas_del_aprendizaje_colaborativo.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 3

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_off00005e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 5432 bytes
SHA-256: 2bd2bd8500dbbec69d449a375a493a4457b0c85e334b56cc1636b97465874406
font_01_sfnt_off000070ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 11828 bytes
SHA-256: 62ff6bf52c9ec04c4682b0edee4fa89fa225d93711764b84b29c3df1d8a3f71f

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