Malicious PDF — malware analysis report

Static analysis result for SHA-256 66dc853f941676fb…

MALICIOUS

PDF

48.4 KB Created: 2020-08-18 17:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f1428a620d28b1cbf63ec709d4092f7 SHA-1: d802729119ad1b55f7fda86bf7e86dafd5d72a07 SHA-256: 66dc853f941676fb0a44d72f219186bcc162db5c3867aa81b9c04e65192e8cf0
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a 'Lego cmf disney series 2 feel guide' and the malicious URL, indicating a lure to trick users into clicking. The ML classifier strongly supports the malicious verdict.

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=lego+cmf+disney+series+2+feel+guide In PDF document text
    • http://files.paiboon.biz/uploads/1/3/0/9/130969220/guwijuse_xiwadazifod.pdfIn PDF document text
    • http://botog.sholafitnesstrainer.com/uploads/1/3/0/9/130969525/16dc965d7e37c8.pdfIn PDF document text
    • http://files.schoolofmythsanddreams.com/uploads/1/3/0/7/130776757/c79d426a0558.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/1/0430/6183/7981/files/causes_of_noise_pollution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/tagojojivisudusekezub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/natural_disasters_mod_1._7._10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2535/0306/files/telemecanique_altivar_58.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/98541955882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/education_in_the_dilemma_of_a_ghost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/5761719672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/english_amharic_medical_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/eclipse_java_photon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/brief_self_introduction_ppt_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8572/3816/files/54654196616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/9786/8712/files/soduzurotazas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/sekavifumelomeniwugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/14271518994.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A1 5308 bytes
SHA-256: c1710ad2c96574817f74c0e8cb45e346b600e89cffc2f0a066f8e51de2c67d56
font_01_sfnt_off000079af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AF 10484 bytes
SHA-256: 5c67d10afb98d0160b265acd1ffe2d4c4ef4a3e0c13a8ebdc8740781e660b602
font_02_sfnt_off00009dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCC 16076 bytes
SHA-256: b098da79dd067f31ba2c2b8c1c5e919600cd02ab140df2a372f8f699e4c507e4