Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bf3640b928ee28…

MALICIOUS

PDF

47.0 KB Created: 2020-09-02 13:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d8a58f600277d8ccd077eca06917025e SHA-1: 2e79f310f1ec910a58c7964fd1f0c191a43bf1da SHA-256: 41bf3640b928ee28c0de18fda9f28d9dfa3e00a13531d44e4bbdbfa0f95ebe45
154 Risk Score

Malware Insights

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

This PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a 'video film' and the malicious URL itself. The presence of multiple external PDF links suggests a link farm or redirection attempt, aiming to lead the user to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=platform+number+2+video+film In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/3bcfef_7672f83ced054c0393a714982e07d689.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/02af14_f6b2ee761c984abdb5fa73c492457e99.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_4c91929b26ac4a369e61d35d2d485e70.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c12414_bef5c4f4e87d41f0b29651b094081b9a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf5aa9_6b3c8b489866472b936652a8410b3400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/1853/9423/files/oriflame_catalog_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/past_simple_form_exercises.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10a4aa_493ab1b4d06044fbbdc004588c864f07.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/270e53_ba3b6d92305343f59acbc1d3cd06dc73.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 5208 bytes
SHA-256: 9c55fd93566c5f80f873d28c60fc2592c704f7c566f9319686e9e93ad0f47afb
font_01_sfnt_off00008ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 10040 bytes
SHA-256: 39424ebeb03a7a68de4d102e31c2a8a93695a9b35719af1dff6fb62cd1f2d74b

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