Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda9b71db372cb80…

MALICIOUS

PDF

54.8 KB Created: 2020-08-10 20:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84949660222a8b689700a3abfe18b287 SHA-1: acbb1fadeffa388cca3da1ec912924192c634053 SHA-256: bda9b71db372cb80f552b784dc1623c98b0bb1f7f460000833887aa343217db1
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=couper+fichier+pdf+gratuit+en+ligne'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The PDF also exhibits characteristics of a link farm, suggesting a broader campaign to distribute 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=couper+fichier+pdf+gratuit+en+ligne In PDF document text
    • http://files.kinkycandyonline.com/uploads/1/3/0/8/130874326/putone.pdfIn PDF document text
    • http://files.futfemuniversal.com/uploads/1/3/1/4/131407918/9497262ca02ac2.pdfIn PDF document text
    • http://files.hrontop.net/uploads/1/3/2/6/132681617/40b46a37614db.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/1/0439/3166/4552/files/national_certified_medical_assistant_exam_secrets_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/valabinilax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/makalah_tentang_bblr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/haynes_car_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/105108574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/physically_based_rendering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/75000746165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/tal_botvinnik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/cardiologia_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/18211454402.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 3304 bytes
SHA-256: 7c54c13321a22b13e8c8cf75e560e9151677e82cfd7fb4553fa360d909f90a16
font_01_sfnt_off00009511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9511 5144 bytes
SHA-256: 51dbaa1e8fb29e14c7ffde47ad4990595e1325137834df9faac9ccd1e0fc6f24
font_02_sfnt_off0000a68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA68F 12432 bytes
SHA-256: 04af0d7ee9aa4c331d3983d3005a485bd8a934a3a6080b19181758da99f6ce01

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