Malicious PDF — malware analysis report

Static analysis result for SHA-256 140834701c449bb6…

MALICIOUS

PDF

37.4 KB Created: 2020-08-30 19:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb2dc5dcbf627203f2b49136ec6f7ca SHA-1: b2513beeab4adf3ba64ce17af40de682de7c514f SHA-256: 140834701c449bb6a9cbeba726bed32f848de6519e01dcad936320b32f1ae36d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious URL, indicating an attempt to lead the user to malicious content. The presence of a large number of external PDF links, many of which are benign, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=skyrim+pickpocket+mod
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_64d4c30f99834af4941a77d1891491d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d878a99e694a5d98a201f02f8bfb7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f97fa90c669740a3bcc3e42ca525cfbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_38511c11674340fa94f471187ca1020b.pdf
    • https://static.usrfiles.com/ugd/0d089b_03f49765525d4886bc9d53a90b621888.pdf
    • https://static.usrfiles.com/ugd/b47706_4e0527e7349d497697aba902e1c493f1.pdf
    • https://cdn.shopify.com/s/files/1/0436/0231/3373/files/sojaraxavigulijadazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8011/2535/files/vcf_file_opener_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/kofulejonumumujamera.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_off00005584.bin
9045e28e714b5bf35b4ed7166973807303358afbd6c680c012862a2c8b8d708a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5584 5068 bytes
font_01_sfnt_off000066b2.bin
c89f9e1c2ca881ff63564b48ff1cfd90b09ea1a1f1ce0f0fa34d3f091395fc41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B2 10228 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.