Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e99c8dbf1c6921b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-27 20:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 966f3b2a8f0deb495b799f9e3a15f135 SHA-1: 772f5b32ec7c46de319e32351eeaf478abec0b53 SHA-256: 6e99c8dbf1c6921b3d2f49b7a0cf71b090d15d73bbdcd3e446e4767f4a60c25a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body text, though partially corrupted, includes the title "Problème d'optimisation exercices corrigés" and the same redirector URL, suggesting a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness.

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=probl%25C3%25A8me+d%2527+optimisation+exercices+corrig%25C3%25A9s In PDF document text
    • http://ferij.lyncostudios.com/uploads/1/3/0/8/130874197/09b306bb.pdfIn PDF document text
    • http://files.thescreamingrocks.com/uploads/1/3/1/4/131438353/pewafuz.pdfIn PDF document text
    • http://files.roberta-comunian.uk/uploads/1/3/0/8/130874489/memeriz.pdfIn PDF document text
    • http://sesad.lighthousehorserides.com/uploads/1/3/1/6/131606339/7088320.pdfIn PDF document text
    • http://fomuvow.shadyriverlaporte.org/uploads/1/3/0/9/130969754/tunupo.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/1/0429/5111/4908/files/tm_9-_2320-_387-_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/rilutubijemogejavijomowiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/prisma_literature_review_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/blank_june_2018_calendar_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/gunumijipenipivobumul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/important_name_reactions_in_organic_chemistry_class_11_cbse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/22885521719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2722/7036/files/70297327003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/hypothyroidism_guidelines_aafp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9927/files/swot_analysis_en_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2809/3856/files/relumo.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 1

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_off00005ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 5920 bytes
SHA-256: ff20611e36973960d33a74ea2c7cf35587f0fd9919951783c37153eaa4d666b4
font_01_sfnt_off00007259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7259 11628 bytes
SHA-256: 7d406da25bfe93f440ba2a9e299b9e32d4c8cbbbaad2766f738d898f22fb82bd

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