Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7e8b75e89f990d…

MALICIOUS

PDF

41.9 KB Created: 2020-09-04 12:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f80d6676e5f932587b9996e9cc4cf26 SHA-1: 28cddbd260530ba723198509b5655bce277b6f9d SHA-256: 6e7e8b75e89f990de9b1b757a9c85ea93e3aa70b3aaf995583647ee1b97c9374
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.me/wix?keyword=astigmatic+dial+pdf is associated with malicious activity. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is designed to host a large number of external links, likely to obscure malicious intent or distribute further payloads. 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.me/wix?keyword=astigmatic+dial+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2274a7_9b16b13237e04b738d20130b93e73557.pdf
    • https://static.usrfiles.com/ugd/764aaa_eba94009a2624e5284ce6614f117242f.pdf
    • https://static.usrfiles.com/ugd/7e6083_fb48e1823fcd41498b4e5eabca848610.pdf
    • https://static.usrfiles.com/ugd/4dd980_c1f9d5518dc141f9876ccb8504a5a90c.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/50_cent_big_rich_town_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/54577531416.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/breast_cancer_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8520/8483/files/mind_your_language_cast.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/kezepituzusejawijomiber.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/baxod.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/advanced_public_finance_and_taxation_cpa_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/how_to_untimeout_someone_on_twitch.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/62547343508.pdf
    • https://cdn.shopify.com/s/files/1/0436/0460/7139/files/93913596064.pdf
    • https://cdn.shopify.com/s/files/1/0432/6994/7555/files/86269955141.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/rozapipin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/two_week_calendar_template_printable.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_off00006680.bin
fecd02d4ce0c7fa6587cee21a0d30670724143f5d8943a8a9dd7fe6c70d2b3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 5368 bytes
font_01_sfnt_off000078b6.bin
56ebcab720ef997455db267aefaff5514904ef644554becddbb31ec9da057c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 9892 bytes

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