Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bad56dfb1a0fa57…

MALICIOUS

PDF

46.1 KB Created: 2020-08-27 14:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e71bc8f7d0346e021d5d038f965ebf34 SHA-1: 6e526fb237643719068c8a216d5f0b0188ae89a1 SHA-256: 5bad56dfb1a0fa5724e06c0fbe1608bb0220555680a4be3635d825a8ba03309a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=how+to+download+python+and+pygame`. Additionally, a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The presence of numerous external links, many pointing to Shopify domains, further supports a content-luring or redirection-based attack pattern.

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=how+to+download+python+and+pygame
    • http://files.pthsenglishgarden.com/uploads/1/3/0/7/130776749/tixit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/1457/3467/files/espejos_eduardo_galeano_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/jonathan_tennent_child_of_rage.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/masupolusivogekoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/rawigumobitazidazod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7804/9189/files/86934850658.pdf
    • https://cdn.shopify.com/s/files/1/0436/9956/8795/files/86735558171.pdf
    • https://cdn.shopify.com/s/files/1/0437/7103/5809/files/mango_live_chiaseapk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/30872964975.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/59653204164.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/37872601663.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/7716362592.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/tidatif.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/26041101021.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/rezaredefelejup.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e30.bin
6acb23ded84400bb20c5c51d5166153660038c0ce732ab742b113f39f36772e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E30 5252 bytes
font_01_sfnt_off00007000.bin
2a6c592095f9b2df902f25aec580b67efd1d02dc5ff543e815e777311c4eb5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 10448 bytes
font_02_sfnt_off000093fe.bin
2cadb2ae25cea88cb182acc54f62d1c218aef5f2772c4081b94d5d3cddde1204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93FE 16388 bytes

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