Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecac38333d79ff0…

MALICIOUS

PDF

42.0 KB Created: 2020-09-04 05:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22831f1c007121245b6ed55bc36d58d5 SHA-1: f3697b286090f5ea20361aa4da132817cbdf83d5 SHA-256: 7ecac38333d79ff04d121d9a4290092e5655cc2f79f1f679ae410fff1bdc77dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.me, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Disney violin sheet music' and the malicious URL, suggesting a social engineering pretext. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=disney+violin+sheet+music
    • https://static.usrfiles.com/ugd/7c3584_256754a20dfe4f5cb6ecf81f99fe001c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c7f8045d3244e7bbbeaa3b1f5973342.pdf
    • https://static.usrfiles.com/ugd/21a131_056b491ce2c34bae929916a876de3cf9.pdf
    • https://static.usrfiles.com/ugd/7603ae_dc4b6c891a5f49258959e38a33bbfabc.pdf
    • https://static.usrfiles.com/ugd/cac9e4_09e0973a8b61456ead85d2dad34554da.pdf
    • https://static.usrfiles.com/ugd/33ab24_6e17c61433d74d68906306bbbc453355.pdf
    • https://static.usrfiles.com/ugd/4cf28d_95e27b8211c84ddab15e1ddfa09a4ec5.pdf
    • https://static.usrfiles.com/ugd/05301a_325c5fb98a7d4bcda59e07b9091ee08d.pdf
    • https://static.usrfiles.com/ugd/694d5d_ff99e41da0c14a98b38b724b7fbcb9f9.pdf
    • https://static.usrfiles.com/ugd/f9fac6_d332e8affd1447f398e619acb4a38cce.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/58276069428.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/58638255744.pdf
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/11839412051.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/94356905709.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/acog_guidelines_asymptomatic_bacteriuria.pdf
    • https://static.usrfiles.com/ugd/b8c837_df531d34307749408b6e1046aa681173.pdf
    • https://static.usrfiles.com/ugd/086daf_4972e0a2d6bd441e9ae1bf5a30e7ad52.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_7a53a60b04ed45758cfe2f8a92c06b50.pdf
    • https://static.usrfiles.com/ugd/37987b_894dac6123a94ba6a4f6592dd10c2399.pdf
    • https://static.usrfiles.com/ugd/2c8d66_d62a50f33efb4f239c58f6b6f265c8a9.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067fd.bin
4d83e1b2f8cf0a2092225a275939469d33f35357d4765fda976314b1f87b330e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 4892 bytes
font_01_sfnt_off00007895.bin
65433eef7ef3a64a122660b931bb60bd6bbebbc91c99220830562f821fe281ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7895 10060 bytes

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