Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e1a82578959c3f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-29 17:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038273fbee6dacbf1d914a1692112d38 SHA-1: 49ee5a7b65fca6ac612a31fcf53e5d88ee4a91bd SHA-256: 48e1a82578959c3fff23521d6d6565f4bc8401a6b487e9650304e59f994944bc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=harbor+breeze+fan+control'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=harbor+breeze+fan+control
    • https://static.usrfiles.com/ugd/b8c837_1681138beec549f89663bdb1f729f914.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d5f7a0aaf34f9e8a31f1af57986d26.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f2916d2f0f442a685aecd313d6cc282.pdf
    • https://static.usrfiles.com/ugd/b8c837_680cec348eef439dabd0a506550f8eb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6af8fe385d894162a2a89e7976411d9d.pdf
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/vojubipuribonuvone.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/24321841043.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/tozadafepori.pdf
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/25161056026.pdf
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/cp_575_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67279733654.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/2006_honda_accord_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/37804004711.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f49.bin
1fd7f0fd1b5fb296c5cee5fe91930409ba7125ea3d67539b77c2ab4c07f2ebbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 4848 bytes
font_01_sfnt_off00007fda.bin
7d46b2956f1bfb8d845bc2cf35c4c55b14ab447d1be84394b7fcdb6c5ad05284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 10292 bytes

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