Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e65d43f7bf0de3c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 05:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eecea52052c08aea9ad195d78dbe51a SHA-1: 43610d1dad2151e6f8491333754d71292e3484cf SHA-256: 0e65d43f7bf0de3c5d196cb834d4f24bb522cae63a1ffe170d58500935ca0e4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to benign content, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text suggesting it is a presentation template and includes the malicious URL, indicating an attempt to trick users into visiting a potentially harmful site.

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=hojas+de+presentacion+a+mano
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_324eabb27b67418593593c50426704ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ef699fc2d4d42ba939b6968eb95f81e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed0b716124984bd295055a03a17a085f.pdf
    • https://static.usrfiles.com/ugd/b8c837_8229140aaf0b41858f7c244115af44ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_88a785bdd1dd48a7bb11b551711a20dc.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/9882897133.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/nuvetobemupemejegulir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/printable_ruler_actual_size.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a97b535424944388ee9c23b16124b08.pdf
    • https://static.usrfiles.com/ugd/43d598_3bd77ebf32c1466ebe0bf298532fb9a2.pdf
    • https://static.usrfiles.com/ugd/a58b01_fc28fa405c634df29f9d1f8df65f4d09.pdf
    • https://static.usrfiles.com/ugd/dad90e_5c0733bc85e04d87bf2ebee670070d0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_aafbd17cb98245e3a07b59be7b774e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_685f764df56043f5906e98e4183beb37.pdf
    • https://static.usrfiles.com/ugd/b8c837_22c967cb24a741c786d850dd4552cf43.pdf
    • https://static.usrfiles.com/ugd/b8c837_57857feb91ca481c9a83f02965e15cfc.pdf
    • https://static.usrfiles.com/ugd/87b9a8_95fd9724e20f4e858eb0fa4f60fd3cfc.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_off000069d4.bin
fe240e3d3bbbb9b69bff92892e2981cdfec98b645e59b514dcfd49e9c6e19a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D4 5224 bytes
font_01_sfnt_off00007b86.bin
e56144f9fc007499e684b40de6d4d51a68c565a28be65ca294c678767c0e7723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B86 10628 bytes

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