Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f1e874a3fc68ad…

MALICIOUS

PDF

34.7 KB Created: 2020-08-21 18:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76dac363c7f3f822c10d5b3a21d57b20 SHA-1: 0a6761007047d479ec498358cae336c5a882f4f5 SHA-256: f0f1e874a3fc68addd1426202eb52a968fc5ab1e4c2cf3e8fca7aa7216db0ab7
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, many of which point to external PDF files hosted on various domains, including a suspicious redirector at ttraff.com. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that this redirector is known to be malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=additional+mathematics+revision+notes+pdf', suggesting a lure to disguise malicious activity as educational content. No scripts were extracted from this sample.

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.com/pify?keyword=additional+mathematics+revision+notes+pdf
    • http://files.stewartislandnews.com/uploads/1/3/0/9/130969680/buzebeduji.pdf
    • http://files.meyerpaintingcompany.com/uploads/1/3/1/4/131437123/vipoxabuvu.pdf
    • http://befusuf.moriahlamb.com/uploads/1/3/2/7/132712354/197a07.pdf
    • http://files.takingbackmusic.com/uploads/1/3/1/4/131437766/vipakutakimadenawobu.pdf
    • http://nogotigop.janson-hareware.com/uploads/1/3/1/6/131636947/6339702.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/beneteau_first_36._7_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4583/files/44568614523.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/puxowefexun.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/muvuwafamefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7623/files/ambarsariya_2016_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/nptel_genetic_engineering_notes.pdf
    • https://cdn.shopify.com/s/files/1/0454/8486/7736/files/android_application_game.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/fazatakedazegutanaxerakut.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3155/files/office_administrative_assistant_resume.pdf
    • https://cdn.shopify.com/s/files/1/0450/2398/5828/files/37217700060.pdf
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/handwriting_worksheets_for_kindergarten_printable.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/navabolulib.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_off00004a30.bin
9c73d063a79d276b74c5afd197cc2ce7e1d02d008d5a90d5750e29e77fb83dba
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A30 5444 bytes
font_01_sfnt_off00005c89.bin
5a872e72bf65d38f5381b0805464227f98914b5d34e72e27152539f5ca4ef8a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C89 9660 bytes