Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c684ed06108f4e…

MALICIOUS

PDF

48.4 KB Created: 2020-09-02 04:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee816ea90bfed30eb2d604958cb966f5 SHA-1: f93a34c21ccec2564808b3a4cfe7734f806436e4 SHA-256: 06c684ed06108f4ed603eb0f13634b1cc8fc4186e2406edbff317d6fc3fbda81
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a URL promising free software. This URL is likely part of a phishing or scam campaign designed to trick users into downloading malware or visiting malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a reference to the malicious URL.

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.link/wix?keyword=free+autotune+software++for+windows
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/wapatutem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/blank_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/fefakanilebexamokulemuz.pdf
    • https://static.usrfiles.com/ugd/89363e_c08dacd72f7446cab87651af4ad62d0e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/11367709590.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/keriwuvesofize.pdf
    • https://static.usrfiles.com/ugd/eb4c03_a3098c13d36f4534a7b3186d752d4766.pdf
    • https://static.usrfiles.com/ugd/b8c837_715346d638d14508a09eaaf21faff564.pdf
    • https://static.usrfiles.com/ugd/de60da_5424ecd3d364425180e6dc729133b736.pdf
    • https://static.usrfiles.com/ugd/4d548e_8ed61cc453de4e388f6e091db7917058.pdf
    • https://static.usrfiles.com/ugd/909b15_b214c6ac83284eba881e4ac5bef9c3fd.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_off0000808f.bin
fd8f02b3d736109bcf1afb921f99c5c7bc7d7737368e4d99ce0622e1d2d26d00
pdf-font-stream PDF embedded font (sfnt) at offset 0x808F 4916 bytes
font_01_sfnt_off0000916b.bin
2166543aae8248292d5e61094b7d1d50e824e9207168586f40a38eef19ef840c
pdf-font-stream PDF embedded font (sfnt) at offset 0x916B 10364 bytes