Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9e962371c67a50…

MALICIOUS

PDF

38.0 KB Created: 2020-08-26 23:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37ec5cd08df3c22746e83853920be483 SHA-1: ad3bcef6d252f0f206e946368cf0128ffa6745a2 SHA-256: 3c9e962371c67a508e021c55f3a651691df8739f7ff5696b21f0c3d5354e0fb0
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, https://ttraff.com/pify?keyword=determinantes+posesivos+ejercicios+p, points to known malicious redirector infrastructure. The presence of a large link farm, as indicated by the PDF_SEO_LINK_FARM heuristic, suggests an attempt to manipulate search results or distribute further malicious content. No scripts were extracted from this sample.

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=determinantes+posesivos+ejercicios+p In PDF document text
    • http://revudaxev.georgeflcharlesairport.com/uploads/1/3/0/7/130775136/388e9.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/1/0438/9843/7784/files/kimefuzozekitef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/free_download_aptitude_questions_and_answers_for_bank_exams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/lixeriguribofiginut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/12330607476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/43556578773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/74924085169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/respiratory_system_diagram_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/40986290699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/tunabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/air_iphone_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/wipunupo.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_off000054f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F6 5184 bytes
SHA-256: 307876b736b3507b4a164e2fbc806442b1493eb0deba212c994e7a009989ccd3
font_01_sfnt_off0000668a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 10992 bytes
SHA-256: 4f74bb984df6c6eee3d8e3f18fb7bff281d8a930720de2337cae2200b265a919

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