Malicious PDF — malware analysis report

Static analysis result for SHA-256 621022e97625119d…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 07:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15bf9f659234ee25f4990023cbf8551e SHA-1: 03036b43761f675019cf7dc575e1d75e669e48e0 SHA-256: 621022e97625119df32cb60d4c7241fd965d3cbdedc91cb8020f3494f4feee53
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 PDF_MALICIOUS_REDIRECTOR_LINK, pointing to `https://ttraff.cc/pify?keyword=chromium+ubuntu+16.+04`. This suggests the document is designed to redirect users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a phishing or redirection attempt, likely delivered as an attachment.

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=chromium+ubuntu+16.+04
    • http://wozelu.amazingbookspgh.com/uploads/1/3/1/4/131452839/sulafogedafagaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8153/9487/files/34883523716.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/muwemikomevow.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/arturia_keylab_61_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/48653964404.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/kitchenaid_artisan_coffee_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/53614358221.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/beposixodivonomoni.pdf
    • https://cdn.shopify.com/s/files/1/0450/9846/7480/files/bhutto_song_remix_by_dj_shabbir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0464/5198/2504/files/83923644720.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/guwuvitumobo.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_off00005c2f.bin
33e6dc4f7a2ddc50754b02122947597c5d5b77f6ab46723b8c90ffc561f7f727
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 5020 bytes
font_01_sfnt_off00006d31.bin
4c2b2c93398701031825b8e9543dc360cbb758a3e085ced054c4d3cc7a0e4ddb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D31 10320 bytes