Malicious PDF — malware analysis report

Static analysis result for SHA-256 7564762fe565608a…

MALICIOUS

PDF

82.1 KB Created: 2020-09-02 00:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41d0529bf4025a4b6d8f9b4f7f302d3f SHA-1: d51d89fe051ed26ad0f594c086535d4cdb0a1fe9 SHA-256: 7564762fe565608a366814821cd917fbd35fe7dae693cf23528dd417f9e2f7f2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a check for crystal reports runtime version. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt, further indicating malicious intent. The ML classifier 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.cc/wix?keyword=check+crystal+reports+runtime+version
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/87d215_97a0b2d20f17497882c18a4cbad8a198.pdf
    • https://static.usrfiles.com/ugd/4b68be_bafe83473c5d43078bf03565a8064ab0.pdf
    • https://static.usrfiles.com/ugd/b8c837_66775c8e62984023ab82d7d576558559.pdf
    • https://static.usrfiles.com/ugd/b8c837_74beb7bea6ba4e3fb1485657d6d6f66d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7472894cf8c4921895d0f1fdb15bfad.pdf
    • https://static.usrfiles.com/ugd/6e3131_dd178dcb68cc44e8b6a978e3c3524c3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a309032ba28d4d289b36c7be125dabd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_939780b089b844c687de3aae71206cc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1afed4af97774fb89ac2cd30adfd8427.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/72391430890.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/40393297731.pdf
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/4411033209.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/5931324918.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9f18cad06e041a6baedb4428c042c3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7f0ea5bba1b4cfda4152b01335ee83f.pdf
    • https://static.usrfiles.com/ugd/b8c837_397e5adb5d71462683c20ca01294e691.pdf
    • https://static.usrfiles.com/ugd/7f46b5_5db4f1398dc041d28bfc7ed6ac063a6c.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deab.bin
3afc8f0b6c0fb32aee79c0ebe35be3fd2dabab4b585211329ed19ccfc5bce2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 5304 bytes
font_01_sfnt_off0000f092.bin
9b844ec6a71e5922d200ac2a16854128c0cb0c717ca2993d026584ec9a128677		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 11256 bytes
font_02_sfnt_off000116cf.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 16204 bytes
font_03_sfnt_off00012bfd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFD 4324 bytes

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