Malicious PDF — malware analysis report

Static analysis result for SHA-256 197eceb152f3f854…

MALICIOUS

PDF

36.6 KB Created: 2020-09-05 08:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8f6754123a066c77659bc0f267bd4f94 SHA-1: b56cf3d95635a969f7248a0f5a6da672e7bd22b8 SHA-256: 197eceb152f3f854c156b1663495a44e8caee03f9cb3cd2f63c19691c1622b84
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful destination. The presence of a "download button" heuristic and a large number of external PDF links further suggests a malicious workflow, likely involving the download of a second-stage payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=tradu%25C3%25A7%25C3%25A3o+burnout+paradise In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8fa69218529147fcae3f294073b34b4a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8bc2a6_699157c4d8384543a55d2f9e107f059b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/07ef24_cfd924ba4a6f4007a5389ddd4c776678.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f65175_ccf25b6d1c384b2084b4829c7ae27aed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9421c8_d8321a7d9c6f4d1eb0c090a437519585.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9ea9b6_60f9ef15da844bfab0eb5bc879147803.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eed56f_8243e48e4a6647fe912fa5a83999e471.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a382ee_69179cf760014970821744f5e61aef2b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e16aa_f332c95c68ac4ab2beb470004d7f91b6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dd980_4e6bdae82cf64c778987fcdbd6746c2a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/268ab1_2ccd2f1ba10043728aec6af1472ea035.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/733c1f_d9bd831f1d2c4553b483de917f20192b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/figibotigagogabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/71691251088.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CCE 5512 bytes
SHA-256: 3bdbd98a792093fe7b4f27ce3bfc6af7e7ef0ef9a18a4f50fb216e87df9ac0fc
font_01_sfnt_off00005efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFC 11752 bytes
SHA-256: dac14cd6def8661b523a33c5b6a14ef2162126515b0f81543fe6287924cba357

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