Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc410e9ccfaeefbe…

MALICIOUS

PDF

39.7 KB Created: 2020-08-27 15:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d340c52b0e9b19d8f9aa79186f1d28b7 SHA-1: 9c075a90bbb9b46ca388603bf6867abe3b2f8a00 SHA-256: dc410e9ccfaeefbe95b052170b996f993cab11e575abee511748ab69cf467811
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.club/pify?keyword=ejercicios+con+adverbios+de+frecuenc, which likely serves as a lure to a further malicious destination. The document body, though partially corrupted, contains this URL and references to 'wkhtmltopdf', suggesting it was generated programmatically to host these links.

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.club/pify?keyword=ejercicios+con+adverbios+de+frecuenc In PDF document text
    • http://xafelewor.anastasiasaldina.com/uploads/1/3/0/8/130874222/f650f100a37ec.pdfIn PDF document text
    • http://fapefe.warmanddryuk.com/uploads/1/3/1/4/131453358/3598969.pdfIn PDF document text
    • http://files.marissaoneil.com/uploads/1/3/1/0/131071166/vumaz-webafurupujavim-rigubedinane-dazun.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/1/0430/8942/8637/files/dudijexuvad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/jenixomojup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2693/9042/files/road_trip_fortnite_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/himnos_y_canticos_espirituales_iglesia_de_cristo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xanixiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3701/1613/files/intel_i5_6600k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6990/6852/files/29277218522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/xibabadegavin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/bhojpuri_actress_photos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/kejajakomipomafoniku.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 4

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_off00005a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A59 5216 bytes
SHA-256: a57649d8a7df1cd9ac423886069ece0fb0e93ea837a8e1b95ec725ff97d13c26
font_01_sfnt_off00006c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2B 11696 bytes
SHA-256: f4026dadc0a5ccc68bae1eaa4b1cc5f96e3bd60a3a02b5ea96fd34ba10d1f225

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