Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9a5dd2fc72e9b7…

MALICIOUS

PDF

45.7 KB Created: 2020-09-04 19:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4679b4d17d009ab01c73f7d94629dab1 SHA-1: 7c63093a6b0bd9864679f7c321197040455ef15a SHA-256: 0f9a5dd2fc72e9b772e8f43fd715e28c30b7e6a199fcd43faecb5bc71d1d847e
194 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The 'SE_MFA_LURE' heuristic indicates the document is designed to trick users into providing sensitive information like one-time codes or MFA approvals, consistent with phishing tactics.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.me/wix?keyword=steam+controller+configuration
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/high_school_diploma_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/75745476520.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/simple_english_story_for_beginner.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/94001491281.pdf
    • https://cdn.shopify.com/s/files/1/0450/7149/9416/files/38939907511.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/bollywood_all_full_hd_mkv_movie.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/63349203404.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/windows_xp_bootable_iso.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/49878245296.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/26552203367.pdf
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/39154324259.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/36126876704.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/the_handbook_of_stress_neuropsychological_effects_on_the_brain.pdf
    • https://cdn.shopify.com/s/files/1/0440/9081/8712/files/91523277179.pdf
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/israel_koren_computer_arithmetic_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/towop.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/borges_book_of_imaginary_beings.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/7486999333.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/bawasogoralale.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007601.bin
4eb6aaf7f4066decac9a69b80fe64d542c119d8afa613f4fa20bbd89e6cabcba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 5124 bytes
font_01_sfnt_off0000875c.bin
82e67bcc661fd5c6566969bff9063b68e5dfdf37d9c3fef20679b6234b54666f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 10144 bytes

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