Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f6564d42951ec6…

MALICIOUS

PDF

44.0 KB Created: 2020-08-20 02:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aadaeeb6eecdd3e7ba784d8e7cb4bb1f SHA-1: 0af151922e5d2386d2a0eb50d8a22101b66896a3 SHA-256: 78f6564d42951ec6c3dab4dacfc155e148c133f292f0d42ae4e774af515a9ac1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though partially obfuscated, suggests a lure related to "brevet 2019 sciences pdf" to entice users to click the malicious link. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a link farm or phishing attempt.

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=sujet+brevet+2019+sciences+pdf In PDF document text
    • http://files.modestlymade.com/uploads/1/3/1/8/131857631/394327.pdfIn PDF document text
    • http://jufusexab.elilanguagemagazines.com/uploads/1/3/1/0/131070767/nujadotoramul.pdfIn PDF document text
    • http://files.ipathinc.org/uploads/1/3/2/8/132814958/5473946.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/1/0428/6434/5255/files/18843479409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/4224220529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/45287851365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/mosivudaxesixeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8271/9127/files/15494923984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/docker_run_bash_in_container.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/calligrapher_s_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/lotaxatifatal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/casablanca_city_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/pinakekunuturipeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/wugesenizuxafumalezuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/bavoruxanugojigusenaxasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9825/0141/files/addicted_novel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 5768 bytes
SHA-256: 8e9a7ffaaaf6a909af6c628dcac57fc710a9199cb04a57d755249ae514a964e0
font_01_sfnt_off000073b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B5 1956 bytes
SHA-256: 02acf4165f554a3d166ea60747944224e969e304059b3add2db8d3afb6f18846
font_02_sfnt_off00007cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 11580 bytes
SHA-256: becacb1259fcb29048ae689fcce3df866c221f1fd27a01137efec1f62a8e661b

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