Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f05d4a7a378482…

MALICIOUS

PDF

49.6 KB Created: 2020-08-24 16:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 778b3187d6f01156eab8f29673b5b72a SHA-1: 7d34ce6a40b4f60abdbe0483874b39e624f56f07 SHA-256: 28f05d4a7a378482ae5acfc1cb654acccb36c7033f3d0bb7e480de503b79ec08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'apple ipad user guide pdf' and includes the malicious URL, suggesting a lure for users seeking information. The presence of MFA/one-time-code harvesting lures further indicates a phishing attempt. The file is identified as a PDF, and the heuristics indicate it's designed to redirect users to malicious infrastructure.

Heuristics 4

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/pify?keyword=apple+ipad+user+guide+pdf
    • http://vezuwig.qualesnest.com/uploads/1/3/2/7/132740249/d7c128eaa04e.pdf
    • http://files.lestudiosacredspace.com/uploads/1/3/0/7/130776776/8065314.pdf
    • https://cdn.shopify.com/s/files/1/0433/7549/3271/files/61312797009.pdf
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/cracking_the_code_interview_6th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/react_js_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/16334092498.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/96160618501.pdf
    • https://cdn.shopify.com/s/files/1/0463/6370/5505/files/81976380751.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/44500762479.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/18962948672.pdf
    • https://cdn.shopify.com/s/files/1/0432/8718/3515/files/19322713640.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4d.bin
f129d9f947c27be7d9f8e8b26bfc22aa96da4cf54106ab1b20d4e16b4f63f302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 7708 bytes
font_01_sfnt_off0000850b.bin
08e037738af1ff0d7b74035eb863d9a087fa1fc7a2acc5e3a4256a87ca8e650f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 5200 bytes
font_02_sfnt_off000096c2.bin
055d2fa2ba59c6ea0cb82c5f884f432ffab51fc83b67eb5a3b53c16703c0a906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C2 10080 bytes

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