Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa062e1b6caa622a…

MALICIOUS

PDF

40.8 KB Created: 2020-09-01 08:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85d55737a964f45fb2f3accf89265115 SHA-1: b7c42990211384fbdfc99660f37adc45d322804c SHA-256: fa062e1b6caa622a7b1c19252853b92739f709220ee1afac0e3ecc91a8018c54
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.me/wix?keyword=apnea+test+pdf, is flagged as a malicious redirector. The document body is heavily obfuscated but appears to contain references to the malicious URL. The primary attack pattern involves redirecting users to malicious infrastructure.

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.me/wix?keyword=apnea+test+pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/kimufeduruxalonixizom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/pebusobokunoxovatapesibar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/binoluso.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/16413377417.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0458/6435/3945/files/sojoxutabuda.pdf
    • https://static.usrfiles.com/ugd/696b8a_1f2c9c5156514aeeaf0a1165f5c41554.pdf
    • https://static.usrfiles.com/ugd/b8c837_45596a660d2d478ab33f6b427a3f0e8f.pdf
    • https://static.usrfiles.com/ugd/ab922d_1ffa6d707210484cacd903dc21b849c8.pdf
    • https://static.usrfiles.com/ugd/48d9a1_7796e53549c94e849c954b4add847a7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad2a0f22c7be40129c68c2f642b7d6ab.pdf
    • https://static.usrfiles.com/ugd/5de1df_7c5c5acb86d34923a8a829570fa2bc1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b0858a8111249ca9bf11a06f1dafa58.pdf
    • https://static.usrfiles.com/ugd/b8c837_18a232c8759f4d7281a2f901e6568b7c.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_off00006155.bin
3f0b09bd6db49310fb515360cf3e7a2b5c69be9412638dff180be69178032ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 4896 bytes
font_01_sfnt_off00007215.bin
5ed08169f9f107f2423eacc02786f896df4e8de117ce68d04dc0c2fd363284c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 10896 bytes

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