Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c76018138df450d…

MALICIOUS

PDF

45.4 KB Created: 2020-09-12 06:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb76ab82c79578b6883f76bea189f490 SHA-1: 7fa82e38e559a17b1fc29a6de75cb5c4877361f8 SHA-256: 1c76018138df450d9d0ec9c763c69e18d9170ee6e8a64009505049bb5da1b202
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to suspicious domains and a known malicious redirector. The document body, though heavily obfuscated, includes text related to 'wapking new movie song ringtone', suggesting a lure to attract users to click on these links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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.link/wix?keyword=wapking+new+movie+song+ringtone
    • http://files.tsceramics.com/uploads/1/3/1/4/131437930/zitiw-tasatololesapaw.pdf
    • http://vefepi.colescountyanimalshelter.org/uploads/1/3/2/7/132740482/sokekidel.pdf
    • http://wopoxozo.zforschools.com/uploads/1/3/0/8/130814328/58941674b03ca6.pdf
    • http://sofikobe.fishermanswifelife.com/uploads/1/3/1/0/131070718/6006195.pdf
    • https://static.usrfiles.com/ugd/824332_3c6e1a4a745a4f208d001402bc266bfb.pdf
    • https://static.usrfiles.com/ugd/a43ec6_7044ae8571984591b01a6a09b119860c.pdf
    • https://static.usrfiles.com/ugd/72b0e7_529ee49f72f24b6a8285293c87922827.pdf
    • https://static.usrfiles.com/ugd/70c1f8_bfde78b969944cc2b08ed2e6b915ed9a.pdf
    • https://static.usrfiles.com/ugd/73cb9e_f629fe822a2648e5a4a799ac47442fec.pdf
    • https://static.usrfiles.com/ugd/f0e51d_6826f1a8e8d14db69ba8dad0c39b45de.pdf
    • https://static.usrfiles.com/ugd/e948c1_dd2d04ab6e4c4827b1bbb52a5beebe83.pdf
    • https://static.usrfiles.com/ugd/a2e20a_082dca5590514ecfa2b4c6bf11ff894f.pdf
    • https://static.usrfiles.com/ugd/26481d_852506a2f1894c92b938f1eea760c3e7.pdf
    • https://static.usrfiles.com/ugd/b28ae2_3078598941da475d9d0cef5fc7a0a2a5.pdf
    • https://static.usrfiles.com/ugd/409ca8_d4cb0cab69974394837ff8e5f1839f24.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_off000065f2.bin
08a69ecec88976519f8369e656350e9f7c70a529b2d50ab0c66c7803be6369b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 5336 bytes
font_01_sfnt_off00007827.bin
ff21ae5cbbb0bfff85feb1e48a490624319d53d622cbdb1d865140ee3319b62f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 15248 bytes