Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f59f4be6832ecad…

MALICIOUS

PDF

51.9 KB Created: 2020-08-31 18:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f5b1fa4801e60e03ab3b7d7571d198 SHA-1: 9616e2ccc509649c0825a4d4158af51696abcbdd SHA-256: 0f59f4be6832ecad3c80cace24300e0a6512b850ca0825d5a7d382d45e1cef55
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'unilateral contract template' and embeds a significant number of external links, including one pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful content, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user trust for malicious purposes.

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.com/wix?keyword=unilateral+contract+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/62540675978.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/safozid.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6042/files/mepalotexeruvajare.pdf
    • https://static.usrfiles.com/ugd/4b874d_cddd4fec8b0c409ab82245e53e6da413.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a3ad819ca7040918230151a692985cc.pdf
    • https://static.usrfiles.com/ugd/1ee69b_5efa3e58980e40a8ae96d03f2e701803.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fd75b0f258c4480997355246fef35fa.pdf
    • https://static.usrfiles.com/ugd/544c7e_12fcbbb3dadb496ea287a3fabbcb28ea.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/meteorology_today_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/limifofavovaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/53058054949.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/63190352136.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/10852646088.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/hillbilly_elegy_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/catholic_mass_liturgy.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008eb0.bin
ed2420b94c0e2c29271ef238dad5133e97cfc578ccae518280f4c9a65dd30e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB0 4892 bytes
font_01_sfnt_off00009f43.bin
1d26e2a55493f6ed7352b57550d93c7ee0c7895ccce99fcec5984ccb37d515ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F43 10304 bytes

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