Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cfc44aaba36404…

MALICIOUS

PDF

69.3 KB Created: 2020-08-26 01:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ff9a1233c838ef74bed0aad7b964b5a SHA-1: 1950e115e04ff10b16a5c6a64697934d6b3bfd83 SHA-256: 02cfc44aaba364040f2af588cf381978a47ced25efc1ea651309fc7a5710d40a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the document is designed to act as a link farm, 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.link/pify?keyword=actividades+de+ubicacion+espacial+en+preescolar In PDF document text
    • http://mudoxok.chan-candy.com/uploads/1/3/1/1/131164250/aba31f7d6d260a8.pdfIn PDF document text
    • http://files.naturesedgeeq.com/uploads/1/3/1/6/131606046/741244.pdfIn PDF document text
    • http://files.pacengtech.com/uploads/1/3/0/7/130775635/f39d485087.pdfIn PDF document text
    • http://files.westcoastjen.com/uploads/1/3/1/6/131606111/9902366.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/1/0432/8144/9118/files/screening_methods_for_antidiabetic_activity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/casting_defects_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/15653367154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3336/9503/files/21873626036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/madea_goes_to_jail_play_free_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/vademecum_aceites_esenciales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/tasker_profiles_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/telugu_calendar_2020_new_jersey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/37625392666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9835/8165/files/afinia_l501_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/puratogafule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/paraphrase_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/13559469353.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_off0000b7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E2 5256 bytes
SHA-256: 76a8f8f50389d614d09c49f05c5169645317324dad96ef8f6c7e39d6b1286e1d
font_01_sfnt_off0000c9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BD 11816 bytes
SHA-256: 9d73d838d3bb86ec9a5f98622f443b9dd336edca46b387b07446314fa0417e72
font_02_sfnt_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 16080 bytes
SHA-256: bf2bb651642035a19e1b8bf5dc55c4db7948913289cd11d1f66f0c65c0fed8c7