Malicious PDF — malware analysis report

Static analysis result for SHA-256 697e6ffa5d23c4e2…

MALICIOUS

PDF

95.5 KB Created: 2020-08-31 01:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41bd97980d602cc5ffde7dc04c0e3ead SHA-1: 6560da479cc8e3d0a5dac34fe26f2415c16e78bd SHA-256: 697e6ffa5d23c4e23762453c2b4e21c0e21acbbd7491d7e3832204affa0db6ab
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, further indicating malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=novela+de+marianela
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/cf79db_a0876f5474724f2fb9042da4418cb4f8.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_2ca2cd897011448dbb835ed90ff1b7bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_84be0dd07e9441c8ba4c6d17d03b8329.pdf
    • https://cdn.shopify.com/s/files/1/0459/7140/7015/files/mabifekoxonusatiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/day_after_tomorrow_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/27993993187.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/minecraft_skywars_servers.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/lefutidubiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/monumuwa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b42e3caae41f4ed29fa47b2e6b09220b.pdf
    • https://static.usrfiles.com/ugd/f0e51d_45250afbd90f42b6b53161e3dfac4325.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a73af7e2b0f4ecca4c2399887728be6.pdf
    • https://static.usrfiles.com/ugd/0b46e6_883529355d0148aeaabd160c11fefb3b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012da4.bin
65a20168807b0c2eeca6ed607ae81266f701e2894cea21d400eec960a5846b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA4 4528 bytes
font_01_sfnt_off00013ce3.bin
d812e2caf8d0e8719e2f414238cf83b0026b3687535c231610a0b0d97a5be650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE3 11264 bytes
font_02_sfnt_off00016196.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16196 4324 bytes

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