Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50a5a64c8a1f225…

MALICIOUS

PDF

43.4 KB Created: 2020-09-04 00:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d749264cbd79f5b55adf960cb46fba5c SHA-1: 56c851097115d04d538ed40efa7528352b7afa3e SHA-256: b50a5a64c8a1f225cbb917337af364048abb64afc5a5f9eee94a502e6341e0a6
92 Risk Score

Malware Insights

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

The PDF contains a link that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Jennie solo flute sheet music' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=jennie+solo+flute+sheet+music
    • https://cdn.shopify.com/s/files/1/0452/7469/3794/files/tekezemafasatobixiwanoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/1738/7682/files/privacy_policy_template_gdpr.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1461/files/nebijiw.pdf
    • https://static.usrfiles.com/ugd/5f4192_a6d3dca726d948bb83eff9ea1d385c52.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_4e805a1ae5f14c039932021b4f1316eb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/cism_review_manual_2015.pdf
    • https://static.usrfiles.com/ugd/d8966e_7c5ea5222aab43878fa0e3cb9be99e2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c47477d0a47479489360f4e2d25dbbc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041a4.bin
b24d10c7ccafb66e4f23cf77757411ea7f22dcbadc3483348469050729dc04ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41A4 3052 bytes
font_01_sfnt_off00004c7a.bin
8d611d18850d6f3e5d062e1f87faf9d662582eca9718ba670a8c20ba8ee7fd2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7A 4804 bytes
font_02_sfnt_off00005cb5.bin
cd07382e9d828e0a1ad4d0d57aa0245fecad7aaeb5a72286a6cb82703255d9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB5 14388 bytes
font_03_sfnt_off000089c5.bin
99dc80f4e35ecbd485aec20692fae4feb9ee2895e9102f631d55a3222af1d7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C5 16080 bytes

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