Malicious PDF — malware analysis report

Static analysis result for SHA-256 26709ec9f8ea5a5f…

MALICIOUS

PDF

37.0 KB Created: 2020-08-13 12:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2329d52a81ea72f3ab3d53834a04d054 SHA-1: 5dea83f3c75f801b241ca260b7e70c1fdee26b81 SHA-256: 26709ec9f8ea5a5f773fc1bdb8633e94bed06d2d4e57b153d08b56b3befd98bd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicated maliciousness. The document body, though obfuscated, contains text related to 'toilet trouble game instructions pdf' and embeds multiple URLs, including the malicious redirector. This suggests a social engineering attack aiming to trick users into clicking the malicious link, likely for phishing or malware distribution.

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/wb?keyword=toilet%20trouble%20game%20instructions%20pdf In PDF document text
    • http://files.tx-20081afjrotc.com/uploads/1/3/1/3/131398589/7364393.pdfIn PDF document text
    • http://files.wildedgewoodworking.com/uploads/1/3/1/4/131408502/jaleberifufu-fafovalesulafu-wikisi-giniwemakos.pdfIn PDF document text
    • http://files.cbcfreeport.org/uploads/1/3/1/8/131871687/899821.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/1/0432/9262/2998/files/wuzijusakub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71895705060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/brain_on_fire_my_month_of_madness_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/wikagakepuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/tactics_for_listening_oxford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/346358411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/meranadadedadotisoreneguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/22028048487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/69696251771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/cae_gold_plus_exam_maximiser.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 5

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_off00005331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5331 5564 bytes
SHA-256: 9b861930eeb719f41085de3a05714cf4b5f4d16f3502027908868d66fee7424a
font_01_sfnt_off000065f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 9804 bytes
SHA-256: e138d8996b5047ef9048b5a7029659be4e42ece8834152702a6e45b43a4db374

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