Malicious PDF — malware analysis report

Static analysis result for SHA-256 24867e6d7c4376c1…

MALICIOUS

PDF

44.6 KB Created: 2020-09-18 07:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 858e0b89be7ef69a0b0da8839b5d74ee SHA-1: 015c3410872fe0ee7be49c6f2f09ee3d2c4d9264 SHA-256: 24867e6d7c4376c1ce55a04e24e6e18217963f1e6cd5ba99d03969d785a5e55a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to suspicious domains and are flagged as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Workday training manual', likely intended to trick users into clicking these malicious links. The presence of a redirector link indicates an attempt to lead the user to a malicious site.

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/wix?keyword=workday+training+manual In PDF document text
    • http://noxebe.cresapsociety.com/uploads/1/3/1/4/131406286/foded-puxuman-lovifasu-gulajorulaset.pdfIn PDF document text
    • http://files.kristamasonyogafitness.com/uploads/1/3/1/1/131164023/5788931.pdfIn PDF document text
    • http://wikuretu.losangelescue.org/uploads/1/3/0/7/130775350/3466059.pdfIn PDF document text
    • http://files.viableoptionsphotography.com/uploads/1/3/1/4/131407802/nepugojino_rojanumeve.pdfIn PDF document text
    • http://files.glasgowfeis.com/uploads/1/3/0/7/130775484/jupopi-jeles-daribidiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/guider_publication_math_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/76305559530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/wudesiretutofejepofobipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/chinese_keyboard_samsung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/3170/2176/files/koletolaraxirewut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/how_to_make_biogas_digester.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/regular_and_irregular_verbs_worksheet_grade_5.pdfIn PDF document text
    • https://4ff244bd-f105-43ee-84ec-388c247783b6.filesusr.com/ugd/370021_6527831921644b7ea8b258befe1fca52.pdf?index=trueIn PDF document text
    • https://b261ab83-228f-43c5-af75-b7d75229740f.filesusr.com/ugd/370b54_1ac1fe2fab19437b8f177716e6554fc0.pdf?index=trueIn PDF document text
    • https://d4f38d63-6bcd-49de-9064-9a793b455dbf.filesusr.com/ugd/cafc24_dd4c974bc49344dfb5e6b49536b14342.pdf?index=trueIn PDF document text
    • https://970f3ec4-8529-4dc9-80a7-0b5baa4c4d0c.filesusr.com/ugd/271e65_d681522f93b9416ebefc76de5c438e2b.pdf?index=trueIn PDF document text
    • https://75c80d15-f277-4744-b2ba-72b487a87baa.filesusr.com/ugd/724fb5_ffaaf469f47e4263ba15f20e6ac889f2.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 4912 bytes
SHA-256: 28969d2bdd1c88c10231b5472485d8607ce976ed69ac5071bc086e9892dad184
font_01_sfnt_off0000753f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 10044 bytes
SHA-256: 91ada1ff272b89056dba52444be666a6f7fc7aee88232684f4072a1a6d5d5c45
font_02_sfnt_off00009799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9799 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333