Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc19879fc00e9707…

MALICIOUS

PDF

54.7 KB Created: 2020-08-06 15:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68577487abb6ec53cd22a1aa292ca28d SHA-1: 66117fee847ef2044a45232279ad174684940c03 SHA-256: cc19879fc00e9707d3a8c0e1cb7f9662df443c9ececca0913e349b75a421eff5
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Exercices corrigés sur atomistique pdf". The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO poisoning attempt. The primary IOC is the malicious redirector URL.

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.ru/pify?keyword=exercices+corrig%25C3%25A9s+sur+atomistique+pdf In PDF document text
    • http://files.lynnevestalcounseling.com/uploads/1/3/2/7/132710783/fojelajiku.pdfIn PDF document text
    • http://files.fatallyyoursrocks.com/uploads/1/3/2/3/132303181/mamajaf.pdfIn PDF document text
    • http://files.townsonsmithdesign.com/uploads/1/3/2/8/132814343/bevupafef.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/1/0433/0808/9509/files/ruzevanifanuwiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7175/0822/files/56509684417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/48328995333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/46829522797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8442/3073/files/orthographe_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5713/6294/files/fuzawesuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8234/1781/files/26738605103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/buzumadurogugupovitenamez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/rigekokuxobax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.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 6

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_off00009139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9139 5736 bytes
SHA-256: b133fc6947f16ff04ecffd7befac6eb35b76919ff00d2d9cf3cb6201162273be
font_01_sfnt_off0000a46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46B 12368 bytes
SHA-256: 5e12fba48733f758fbeb0a0308b9acf6b3594106d6bf7ef785556191dd662fc0

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