Malicious PDF — malware analysis report

Static analysis result for SHA-256 3975cc398777536e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-27 13:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0daf7b0cebedfe173249964863ef4045 SHA-1: 15e3b9d771e835806286c1b2d5d3224e77617790 SHA-256: 3975cc398777536eac81e1340d4cfa6769b41200d967487baa400408ff8b367f
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one prominent URL pointing to a known malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=libro+negro+de+autos, which likely serves as a gateway to further malicious content or phishing pages. The presence of numerous Shopify-hosted PDF links suggests an attempt to obscure the malicious redirector within a large volume of seemingly benign 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.com/pify?keyword=libro+negro+de+autos In PDF document text
    • http://files.rumahbudayaindonesia.org/uploads/1/3/1/3/131383541/tozese.pdfIn PDF document text
    • http://xubodosi.milagrodesignsantafe.com/uploads/1/3/1/3/131380005/gaxuk.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/1/0465/1663/3750/files/gamaliel_primo_de_celia_cruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/9543895973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/5831/6700/files/borax_crystal_lab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/98406888931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/repolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/laburulaxalakiwuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2291/6520/files/carnap_empiricism_semantics_and_ontology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4705/9361/files/phelsuma_madagascariensis_grandis_care_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/xanirab.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 2

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_off00005b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B47 5044 bytes
SHA-256: ed5226ee841435f86416c8734664a765a85ba52db064d28a49f4d1e0ffd3c5eb
font_01_sfnt_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 11444 bytes
SHA-256: 84214d0db38fc17bbd351c75ad4a58c1b54006e09ab33b51fe27546ac0f23190

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