Malicious PDF — malware analysis report

Static analysis result for SHA-256 1657a09fdc2de9f9…

MALICIOUS

PDF

48.4 KB Created: 2020-08-03 15:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91fc597aa425537328f49a6c08f53bc2 SHA-1: e6f70c39060d6e1b5de3fa6912bc181d6f8d6178 SHA-256: 1657a09fdc2de9f99eff6dd9afb25487ce9b21fc96ec7ca1c986274bcaff4b3d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to an SEO redirector, which is a common tactic for phishing and malware distribution. The primary redirector URL is https://ttraff.cc/pify?keyword=exercice+corrig%25C3%25A9+algorithme+les+tableaux+pdf, which likely leads to a malicious payload or phishing page. The document body, though heavily obfuscated, contains similar URLs, reinforcing the malicious intent.

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=exercice+corrig%25C3%25A9+algorithme+les+tableaux+pdf In PDF document text
    • http://files.ronellesart.com/uploads/1/3/1/0/131070407/1ed8d1ac52fa8.pdfIn PDF document text
    • http://files.nicecurb.org/uploads/1/3/2/6/132680890/7002355.pdfIn PDF document text
    • http://files.clearhorizon.ca/uploads/1/3/0/7/130775199/4803881.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/1/0431/0673/0144/files/93062999543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/1720167268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/cub_cadet_attachments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/98295454195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/taxexagivolapadadulid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/dijijimaxutin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/54627269610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/zediwise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9945/files/34734953326.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 7

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_off00006efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 5876 bytes
SHA-256: 194a2719e3323081307057a6c6fb4698f07ca06a514674e018e47092a0eae502
font_01_sfnt_off0000828d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828D 15992 bytes
SHA-256: 78a36df40e4b820c2797f32dda1446b2ce19ba3ac95a04a6e7fe157e9195c20b

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