Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f740636eb1de79a…

MALICIOUS

PDF

31.7 KB Created: 2020-08-30 02:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e7ac8103e796d381041a549103fde0d SHA-1: bd2d1e655120acf4b97521f820617f0c13895bfd SHA-256: 2f740636eb1de79ae4ac1b28b21be120f621dd772f57de02681b17c22b9f483d
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.ru/wix?keyword=blank+world+map+continents+and+ocean. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.ru/wix?keyword=blank+world+map+continents+and+ocean
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/51504639810.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/23234587428.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/jigaveneseditobedul.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/wosepuvuzisuvema.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/ridomomewokasiledaxoniso.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8f7d119cd7a4af69d3d0cf4b5e29ad9.pdf
    • https://static.usrfiles.com/ugd/ace02d_833d00030f2b4898a978edaa0800d21d.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_d385ce8e57f045c28bca0959d05346c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8049b98673904312b7b2d5c28064677c.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/arma_2_operation_arrowhead.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/nufidoka.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_off00003fd9.bin
4b327d71926e334ffbf175aac92ffe8254be39582de2b2062726d45729e9083a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FD9 5424 bytes
font_01_sfnt_off00005244.bin
4af0237f107e643e61ff2d4ea3516ebd2aa4c0183bc666440edd51fb1d099aa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5244 9372 bytes

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