Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdfe8d20ad3765a…

MALICIOUS

PDF

42.8 KB Created: 2020-08-18 19:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 720d0d8cf7d6a914d0f1d6bcdbeb8a00 SHA-1: d3cde41a1662daf76f0b9e6282a2d8f3fad0e746 SHA-256: 6cdfe8d20ad3765a3a48b28de8cbb99d0c3bf0aef52fac91079487d8e7a7e837
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes text related to a 'free planned maintenance schedule template' and the malicious URL, suggesting a lure. The presence of multiple Shopify links, some flagged as benign and others unknown, indicates a link farm strategy. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content.

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/pify?keyword=free+planned+maintenance+schedule+template
    • http://files.kullaf.com/uploads/1/3/1/4/131453861/penuvexegikaxovegid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/milovigabumalifezixetom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajafaliwufenosikem.pdf
    • https://cdn.shopify.com/s/files/1/0439/0662/9784/files/97361851476.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2031/files/winewetizas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/caracteristicas_de_los_actuadores_electricos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/low_profile_platform_bed_frame_queen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/66571545813.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/53067556292.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/caminare_en_presencia_del_seor_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/foxit_editor_vs_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/mebajiduvapuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/jusimumeboranepinikativo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/605374581.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_off00006807.bin
104458946bf469a2b55c6dddc1b8a4f5adca9c7bddcbf9e05934eb3e1c9088c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 5268 bytes
font_01_sfnt_off000079bb.bin
4ad0947e6be92bbeebd8d0c9d9ef763c80a721eae21d31bbfc3dfa3fb9dd56c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 11444 bytes

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