Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd94b1d1fe0ff829…

MALICIOUS

PDF

37.7 KB Created: 2020-08-31 06:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 272464c6aabe933746daa32ff7f81db9 SHA-1: 53233875e2d292800d8ebdcae138643b34c33b5c SHA-256: dd94b1d1fe0ff829280308a78f4e17ab1c00b5fe7bc70c37469697ac259171ff
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, disguised with a lure related to popular media. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a campaign to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct payload execution.

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=dragon+ball+super+cap+103+sub+espa%25C3%25B1ol
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/27385942270.pdf
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/tidisuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/9715/9832/files/temusema.pdf
    • https://static.usrfiles.com/ugd/3aca14_6fc89bfbadcd4ba482ab7f46f81a24b7.pdf
    • https://static.usrfiles.com/ugd/f80014_23396fdd09b440988977ace4602345c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62cfd464b1a416fb85931d185a71ad7.pdf
    • https://static.usrfiles.com/ugd/b8c837_2968bec767fc414990ff7115e05a105f.pdf
    • https://static.usrfiles.com/ugd/565485_86d37b3c646b45f88b3d1d0527e2a7b1.pdf
    • https://static.usrfiles.com/ugd/09c3c7_f9505cd60b2b42ad95baeef5886998d4.pdf
    • https://static.usrfiles.com/ugd/dc51bb_a912bbbd8cf94244aeec16e37c545c92.pdf
    • https://static.usrfiles.com/ugd/ca300b_1a03952ff9394b81a33cfd1280eaf615.pdf
    • https://static.usrfiles.com/ugd/b8c837_3654629aa2064e9a974cda5dc80845c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c72998f81a24045ab070bbb986368ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_74d288e799504b99958d9226f29c1549.pdf
    • https://static.usrfiles.com/ugd/429b25_0a653d4cef814519a05bff7a36c738c1.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_off00004908.bin
aaef1f587bb64ebecb7d54c2c7deba149b54e7c5af9a00656d1df74c83bb898b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4908 5812 bytes
font_01_sfnt_off00005c9b.bin
9e3fe097777175f2f34bf1152ba32495cab69bd49a700447939def17f3a1f3ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9B 13784 bytes