Malicious PDF — malware analysis report

Static analysis result for SHA-256 456701d3a43bbc66…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 17:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 083993e7bf4f4af4784ef2744964247d SHA-1: 016812bdee2d43971808fa6661889d22943891b7 SHA-256: 456701d3a43bbc6686d1ca8e0e6cb50d0663ce693bf3459fb3049810e72ac09a
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, many of which lead to a redirector service (ttraff.cc). This suggests a link farm or redirection attack designed to obscure the ultimate destination of the malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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.cc/pify?keyword=calaveritas+literarias+ejemplos+pdf In PDF document text
    • http://files.niaimani.net/uploads/1/3/2/7/132741194/f4f62.pdfIn PDF document text
    • http://josaxupu.johnregan.org/uploads/1/3/0/7/130739564/ccf0e46.pdfIn PDF document text
    • http://files.carolinebowditch.com/uploads/1/3/1/3/131381204/biluw-xowoxizix-zanobufenulote.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/1/0443/3536/6300/files/oxigenoterapia_enfermagem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/chuyen_file_anh_sang_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/just_already_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/49938108263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/51679390215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/power_plate_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/cellular_pathology_an_introduction_to_techniques_and_applications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/lupox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7594/4091/files/96896086175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8556/8923/files/kusezuledevaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/systematic_and_unsystematic_risk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/mcdougal_littell_geometry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/9005/files/8185891459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/38515426594.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_off00006bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 5228 bytes
SHA-256: 217f40f5fcb22699e80f9cba113f05774fb476bfd9a83e6b7c35156aac6949ff
font_01_sfnt_off00007d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 11236 bytes
SHA-256: a192fbd5bc47a08f8e053dfae4a4f59035171f9e816e8c1e754c9d864b7422d9

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