Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddad4b56a39061d…

MALICIOUS

PDF

46.1 KB Created: 2020-08-21 13:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12334f7bfe089d3567b73b73079d68b2 SHA-1: 3e4f8c8a60e4fd589d12766d5df6fe281464f7ac SHA-256: 0ddad4b56a39061df630157093889f1a322265049396a79d14b0545745ffd6b0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to PDF files hosted on Shopify, suggesting a link farm or SEO manipulation tactic. Crucially, it also contains a lure to copy-paste content into a command-line context, indicating an attempt to trick the user into executing commands. The presence of a link to known malicious redirector infrastructure further supports a malicious intent.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/pify?keyword=dpm+installation+error+reporting+services
    • http://files.talesfromthenursinghome.com/uploads/1/3/1/8/131871740/5023143.pdf
    • http://files.riverscapeskids.co.nz/uploads/1/3/1/6/131637385/8053110.pdf
    • http://files.maitrikundalini.yoga/uploads/1/3/1/6/131636632/8a8af66105a2d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/serebenabelemonoduxubero.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/wikemito.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/gezoseze.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/46686767726.pdf
    • https://cdn.shopify.com/s/files/1/0432/1948/4839/files/34310811934.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/dekarepuwozewiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/68134532082.pdf
    • https://cdn.shopify.com/s/files/1/0440/4379/6645/files/revista_natura_2020.pdf
    • https://cdn.shopify.com/s/files/1/0466/7808/1701/files/hanau_articulator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/browser_default_language_php.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/dunosifefedegawinewodol.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_off000069e8.bin
6c866d0a4a8c10262474b529f70a1f1572ef8dc146bbfe4c46c5ba8eb2dd8f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E8 5312 bytes
font_01_sfnt_off00007be9.bin
1df01bd3d9446326e644f6651432bf24a42911e2e9d45cdfb3b6695d79b1eff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE9 15468 bytes

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