Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b2aa89b12e2696…

MALICIOUS

PDF

46.0 KB Created: 2020-09-03 09:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ec53794fc34916c4a643475eed655c SHA-1: f4b9d9174a3e870bc202399a2c7c76170b144f21 SHA-256: a8b2aa89b12e2696bb161eb52c57df9a4771f8273d0ea718d620bb4d60adfea9
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to redirect the user to a malicious site, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.club/wix?keyword=w+d+ka+full+form
    • https://static.usrfiles.com/ugd/911c12_81e1878e89114139afe49d902e5ffa1b.pdf
    • https://static.usrfiles.com/ugd/63022f_832b733e21db493aa8b540a9a523d133.pdf
    • https://static.usrfiles.com/ugd/5befcb_2e05be60199043e183beff70501a0feb.pdf
    • https://static.usrfiles.com/ugd/50de67_bf8cac3562c746479e4ccd8864e25e86.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b9d9deb186495c844334894d34d319.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/joxaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/definition_of_gap_analysis.pdf
    • https://static.usrfiles.com/ugd/429b25_19f2e1ae319f406b882db24cc57b65c3.pdf
    • https://static.usrfiles.com/ugd/1df9ea_9c8d2870b3d44bed9f34cc5975f506f2.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d44.bin
e1372b1aeb6f21de9edbff47fc524743a4f7673bb283e88c5051205af75c68d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D44 4484 bytes
font_01_sfnt_off00005c83.bin
a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 3720 bytes
font_02_sfnt_off000067e3.bin
012f51d2443672be73c62ccc6f08f220703269d3b06edfff524aed3cf28baf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 10048 bytes
font_03_sfnt_off00008a2f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2F 4324 bytes
font_04_sfnt_off0000982f.bin
595fa6af36ec684d1efce723f6b24da915dfcf0c414d61cf687504485f06d760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 5056 bytes

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