Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aedbe17dbda8e32…

MALICIOUS

PDF

47.9 KB Created: 2020-08-30 17:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7affe965497eebf03cec1a28e5326a SHA-1: 6c1b0b47c542f687499c61c94b4b261ebca4a260 SHA-256: 8aedbe17dbda8e325f53c67db4bd4dcc67ae5951ad86ab64309e1b87b462d092
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=team+meeting+agenda+template+for+tea'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to infer a phishing or malware delivery attempt.

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=team+meeting+agenda+template+for+tea
    • https://cdn.shopif
    • https://static.usrfiles.com/ugd/b8c837_64e22d33b8e24ab081d2ae50c4621a43.pdf
    • https://static.usrfiles.com/ugd/93971e_f27c598633ee4c26ab1e3cff8b9d45e9.pdf
    • https://static.usrfiles.com/ugd/05900a_04429a6a8fa047f985bfd28a32391d4a.pdf
    • https://static.usrfiles.com/ugd/930050_762176c37d764ed3a390fba83f1354e4.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/lojuporejapuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/zawitobosorukupon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/free_business_plan_samples.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/20872169870.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8280/files/63428203207.pdf
    • https://static.usrfiles.com/ugd/724fb5_d14075e6016d41c8bbd3d20d8d66b89e.pdf
    • https://static.usrfiles.com/ugd/b88e3d_c2caad437c03481dbc8c672438d41d18.pdf
    • https://static.usrfiles.com/ugd/dd4472_d5854c13452741b1bf97334ddfdf58f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f9fc17a04d442549d9519356a8adbaf.pdf
    • https://static.usrfiles.com/ugd/19103d_e145578ccc2c4e0983a105568f61bff1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/patogenesis_keratosis_seboroik.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7063/files/rejikeru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/xedofinaxizeto.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_off00007dde.bin
644066fd234fb07a28d1348d1bc1c77ec9242ccccf6f854ae98b1e54cdd3be2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDE 5132 bytes
font_01_sfnt_off00008f3d.bin
6062460e2b4d135d85cb1e26b0fa268cc398f3f1db9e5c8e9786d0d92eaa9597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3D 10296 bytes

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