Malicious PDF — malware analysis report

Static analysis result for SHA-256 258120deb7261502…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 06:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd94dfe92bfb6d7139fcea02f804a6cd SHA-1: b9512fa9d5aaf2c7d0677caac33b73464177eab1 SHA-256: 258120deb72615023ee0bce1edfd912773360ef0c8f6cf1e995471344326365e
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=hideman+crack+indir', which is also listed as a critical heuristic firing. The presence of a large number of external PDF links, many hosted on 'static.usrfiles.com', suggests a link farm designed to improve search engine ranking for malicious content, likely leading to further malicious downloads or phishing pages.

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=hideman+crack+indir
    • https://static.usrfiles.com/ugd/5ed537_0c8645d5eb4647c183a11d67c95e45e6.pdf
    • https://static.usrfiles.com/ugd/b3bc21_0fdfd10571c54f40866175b29aeb5edc.pdf
    • https://static.usrfiles.com/ugd/ca32a8_cd5ffb87a98f481ab5eab0b44463acf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_c03b92a567b24e02867ff4b7cdb0cf4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_60427313b8fc48bea578d7add9820f02.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c0483a44233446fa93c17cea1211680.pdf
    • https://static.usrfiles.com/ugd/d775a9_214de8f51d5d4278a19a6031fb725985.pdf
    • https://static.usrfiles.com/ugd/2e79a6_ba4e7523dff248aeac548fac9475a5a0.pdf
    • https://static.usrfiles.com/ugd/a48928_69f7e2568745490580bd5bfcd1bfd703.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2979017001a4e9bbfb78e298b0fcf75.pdf
    • https://static.usrfiles.com/ugd/b8c837_451c69a7ab8d4a5fa28f1bf65de6d96e.pdf
    • https://static.usrfiles.com/ugd/516793_bd3cb921c4dc449ea6069026f08fa90c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6fb2b26b98544619f5113cfd711a39f.pdf
    • https://static.usrfiles.com/ugd/b8c837_23bbc3f41b1c4d88aa8a33f05ba5bcb1.pdf
    • https://static.usrfiles.com/ugd/158fb9_6506fe5f439a46b3bb0a9e9f4c32e8ce.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_off000052e5.bin
5ce4980d7a2dc885e1b225a8301fa91725d30c5d919ae3a311e6e980f53c6c57
pdf-font-stream PDF embedded font (sfnt) at offset 0x52E5 4900 bytes
font_01_sfnt_off0000636a.bin
dbd6c2165e1f6fa96368e6af5142f46a9341c5252a728d9c556032a7c63bd400
pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 10312 bytes