Malicious PDF — malware analysis report

Static analysis result for SHA-256 83118a59a82b1cd5…

MALICIOUS

PDF

64.7 KB Created: 2020-08-28 11:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 724c3ffea3805ae30cae8e56442f2ab2 SHA-1: 4a337fadd731a5394df744c35cf4930e153ca52e SHA-256: 83118a59a82b1cd504fc9c2aa0aef241fd863471b30fd73fdfbac0d3371bbe9b
194 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a known malicious URL, identified as a redirector for phishing or malware distribution. The document body, though partially corrupted, includes the malicious URL and references to wkhtmltopdf, suggesting it was generated programmatically to appear as a user manual. The presence of numerous external PDF links further indicates a link farm or SEO poisoning tactic to attract victims.

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=vitotronic+200+notice+d%2527utilisation In PDF document text
    • http://files.blog.millerlab.ca/uploads/1/3/0/8/130813645/kidok-morige.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/1/0429/8863/4266/files/85132065627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0388/8287/files/16822493500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/root_android_linux_mint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4151/1834/files/74784551842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/91804627166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7872/8345/files/ms_sql_server_2014_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/infix_to_postfix_converter_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/jevuraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/nemazaradazaxefesufulejew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/business_card_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/93876814476.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_off0000b776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB776 5204 bytes
SHA-256: 6cde62d76f1577b9e51e0acc5ceace493195fa1766065d5876ea61f99c73d649
font_01_sfnt_off0000c933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC933 14264 bytes
SHA-256: db6a73ff123a02a1fa7018c5190d05ec82f21e5280727757811e38e4a1b785de

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