Malicious PDF — malware analysis report

Static analysis result for SHA-256 6276e7b0c78cf610…

MALICIOUS

PDF

63.7 KB Created: 2020-09-03 23:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d44d5c2f69d4e2ffea3774158a3eb5a9 SHA-1: 991e040a554ce1d9420510a23f98bc4027b3f8a2 SHA-256: 6276e7b0c78cf6101484c83e96e2fa1ef23cfc864f6e7ef464cbfb6ec51cb3fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to API search filters and includes the malicious URL. This suggests a phishing or redirection attempt, likely delivered as an attachment.

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=api+platform+search+filter+yaml
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e2f197_cf64056d9ce2488fb2220ec7f94804fc.pdf
    • https://static.usrfiles.com/ugd/217d68_51c8cf3fd9ff4ba8bbc499d90ed6f7e2.pdf
    • https://static.usrfiles.com/ugd/b11f6d_04da5c5a2c98456daf0ef130cf11dd92.pdf
    • https://static.usrfiles.com/ugd/253000_569d804a8f3d4218ad28cc49bff3a05b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dfcf5f11552475db2c40cf7f05396e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_656e513a77274f1c97b5d609382164e4.pdf
    • https://static.usrfiles.com/ugd/b56239_0203e63e6f4e40ddb52ff54073e0c828.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/mitilozebofob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/php_get_user_ip.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/reverse_range_python.pdf
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/major_guitar_chords_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/13425294346.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/parametric_design_in_architecture_fundamentals_methods_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/pobiwodipapuv.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_off0000a90b.bin
26d4652970e5e0f583c44f417db2904e43c143edbcb94b0c8f114d7ef2c73fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA90B 5348 bytes
font_01_sfnt_off0000bb1e.bin
c056d1787b9ea1c802ed17f2c2827d22d78f9ab3a0c6ace1e7f262e871c793c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1E 16992 bytes