Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2de6ba31c7beeb…

MALICIOUS

PDF

34.7 KB Created: 2020-09-01 02:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22c26040f3c5a499b8520e97bf95cb96 SHA-1: 51c9f05134ab212ab72ca1ec13bf22b2df6abc32 SHA-256: ba2de6ba31c7beeb54ed9b344fbeba2015b1d0f4c9b618b7d1451721179d7abd
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous other links, likely part of a broader campaign to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=arbaaz+khan+video+song
    • https://static.usrfiles.com/ugd/0a0016_49c07e30b3fc476895327aa89f4313ce.pdf
    • https://static.usrfiles.com/ugd/77941b_25e0891cc060461790c772a98aa527b9.pdf
    • https://static.usrfiles.com/ugd/29c71c_9ff13e9c14bc4ee8b22749e4ea9d481e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b7170ea93f486198b35239bbecb89d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a70e80a52f3a4c23bb7641c38ced28af.pdf
    • https://static.usrfiles.com/ugd/2f07a1_5676312ab1fe4582a5d796508a4669ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b0c942838774af2964df5ff3177f97c.pdf
    • https://static.usrfiles.com/ugd/0df15e_403876daf5dd4b999758401c95ad22b4.pdf
    • https://static.usrfiles.com/ugd/b50c55_1495638159594497bc737d624f5016c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aeafbef4f54d0883ca3820e25ac78c.pdf
    • https://static.usrfiles.com/ugd/a58b01_bb0d0fe41f234c269a8009f21508eed4.pdf
    • https://static.usrfiles.com/ugd/2f8cea_cd83e9d42a2a40fcbb48aac980bee636.pdf
    • https://static.usrfiles.com/ugd/6203b9_854050d9effe4e7fb422e53717a7c592.pdf
    • https://static.usrfiles.com/ugd/36f25b_304cc5febf5a41c6bc2ad97a24a150c2.pdf
    • https://static.usrfiles.com/ugd/01bc73_d13e784a4c9648a798a4653393584809.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_96b44496a45e4dd98934bc4a14419372.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_off00004a40.bin
a771f5b3e1da9e74fbb863d8d6a70b83844d77b4b02f0506a6f2c6a491cb9e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A40 5360 bytes
font_01_sfnt_off00005c7d.bin
917eb971d274c2c7df0c8a3dede1aacc898453ee6190ae67b48d8e129033298a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7D 9952 bytes