Malicious PDF — malware analysis report

Static analysis result for SHA-256 69666ebd1ec96d4d…

MALICIOUS

PDF

40.2 KB Created: 2020-09-01 00:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f161c48df4d197f8c1e76d5f0e55524 SHA-1: 9305b456ac4d709970ea7ab3db5db8c5b03a035a SHA-256: 69666ebd1ec96d4d975e7fa34b7c0f5b3e9f3da321cc9a1bc83e28ad5a3e036c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.com). The heuristic PDF_SEO_LINK_FARM indicates a link farm, suggesting the document's primary purpose is to drive traffic to external sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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.com/pify?keyword=angles+in+geometric+figures+worksheets+grade+6
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/87fdc7_4d6923e5dafc42eba2149fa9370a9ed2.pdf
    • https://static.usrfiles.com/ugd/8a419d_17945b813f484faf8597ac55d184d69a.pdf
    • https://static.usrfiles.com/ugd/913720_82694b61e4884ddb83a2cf210636eaeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fb30e0e92f4478ca04f1c38d6a0d4a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee97749bb1d04e2f90c42d5872c6ea91.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/how_to_change_your_font_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/the_bronze_horseman_trilogy.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/new_orleans_saints_injury_report_week_14.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/74953380282.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/39258686658.pdf
    • https://static.usrfiles.com/ugd/b8c837_f59a302d21804f1a87bd947cccda2507.pdf
    • https://static.usrfiles.com/ugd/225520_25c61a225d204acb95907f77e706ed97.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ee590db22b0406ab72ad62683a0418b.pdf
    • https://static.usrfiles.com/ugd/756799_0903851a5239433b9ec27af7537811ed.pdf
    • https://static.usrfiles.com/ugd/de02f3_eabf53a974514f50b68480d4b81f1d7c.pdf
    • https://static.usrfiles.com/ugd/b50c55_fb5ebb8016944673ada91a605784b836.pdf
    • https://static.usrfiles.com/ugd/57c819_25667570824e4351aaa96b9de355b1ee.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_off00005ef0.bin
784cd4893588fb97e316e7a1714c1bb5714ff67f343f86ac0d4db12084134fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 5732 bytes
font_01_sfnt_off0000725c.bin
d18a681cccfd7ada02a1188952a508cbd09c79b3def480327666f8737e77ce1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 9784 bytes

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