Malicious PDF — malware analysis report

Static analysis result for SHA-256 67af1d15f560648b…

MALICIOUS

PDF

57.2 KB Created: 2020-08-31 23:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7aec6177a3170b6b5b14f1d3d585cc3 SHA-1: 6dfb02327195a5247ed2a813e1facd33db015c73 SHA-256: 67af1d15f560648b651ce7736bd9086d299af871b7587fe39c09848cf45235a1
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, and includes lures for clipboard command execution and password-protected archives, suggesting an attempt to bypass security controls and trick the user into executing malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/wix?keyword=pyrit+rainbow+tables
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/63d3ad_c16a3ce5761a45a4bc042a216a9495ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_4edfeac9870e4392bf67c77766a62750.pdf
    • https://static.usrfiles.com/ugd/909b15_8e274868af3240f780034f691b5b2502.pdf
    • https://static.usrfiles.com/ugd/89363e_2a169d657f844ecbae9406b6583fd927.pdf
    • https://static.usrfiles.com/ugd/97493d_74fe4af6cc094c10b09756fcf299cc47.pdf
    • https://static.usrfiles.com/ugd/d01287_189e76eac2924eb683eaac61e12f1b32.pdf
    • https://static.usrfiles.com/ugd/40512e_40c6b40d5eab4593a4c32d1275170784.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/cost_of_quality_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/95891076537.pdf
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/latest_english_movies_free_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0438/1114/3842/files/dipojujutup.pdf
    • https://cdn.shopify.com/s/files/1/0428/8947/8307/files/15556239333.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/66439556554.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/pdf_autoestima_automatica.pdf
    • https://cdn.shopify.com/s/files/1/0433/7873/7310/files/bawigaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/23247547950.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_off00009478.bin
5411c3696eea5dc405cc74e8019d2f3425952d8b792dc5aa5359e05d9ee81a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9478 5012 bytes
font_01_sfnt_off0000a5a8.bin
9fcd7017d9b07799894e3367d360512b8360d48767a3563ad7d7e331365a6d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A8 16168 bytes

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