Malicious PDF — malware analysis report

Static analysis result for SHA-256 8001fd25e192a258…

MALICIOUS

PDF

48.2 KB Created: 2020-09-01 12:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28352feb301aa42c45cfef64f235d460 SHA-1: eb9d3cfc9b0fa1d9c8b13e5abf825f611d3921c8 SHA-256: 8001fd25e192a2582d01259afb5f52e0a53a63bfbff2b19c142408b7ddf23f06
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious, suggesting an attempt to lead the user to a malicious download. The document body and embedded links also point to a URL related to downloading an 'apk' file, reinforcing the lure. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful content.

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.me/wix?keyword=cartoon+network+arena+offline+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/defcb2_adbc2283f5234acf81448709bd147222.pdf
    • https://static.usrfiles.com/ugd/d43733_d526387d359744ce885305300a369293.pdf
    • https://static.usrfiles.com/ugd/b8c837_28e3e3daad48408fa536b1a636621400.pdf
    • https://static.usrfiles.com/ugd/4bb894_c75b711747824fc6a464a75f99bfcf89.pdf
    • https://static.usrfiles.com/ugd/6260fe_7a5226aab73b47f49019bf64da698d8b.pdf
    • https://static.usrfiles.com/ugd/26938b_b6c341bc7d4d43b1a9ee6a7d885a9348.pdf
    • https://static.usrfiles.com/ugd/0c41e7_e3dd38b6a8504228887c5cc188b640cb.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_ae262332d9e5466ca4600a35b9da5e4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b627cd538a74bdb9da83f23bfb59bdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_a90dd225c32e41e8af431106ff17fda3.pdf
    • https://static.usrfiles.com/ugd/9421c8_11fef70b996b4c7bb20ac4a5bfbe5f94.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006037.bin
1ae841511d022e90ec836373e54df682a3a61e2eee19ea0b04a5195b9a20692b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6037 4780 bytes
font_01_sfnt_off0000709d.bin
889bc8ab4792a297b5b62f51c0caa7b8d15ca221b317a31838ce135faac16c55
pdf-font-stream PDF embedded font (sfnt) at offset 0x709D 14308 bytes
font_02_sfnt_off00009d5a.bin
f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5A 16144 bytes