Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d58a511a16d0190…

MALICIOUS

PDF

34.4 KB Created: 2020-08-11 12:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acf535d761e29a3eeb95abdfd10037c0 SHA-1: 54fbaf355c6661c2d549ad34308b87a8fcb4ebe8 SHA-256: 8d58a511a16d019086dcd853a0da45f9315c73562a5a114cd5a9e4bde476e295
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one that redirects to known malicious infrastructure. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=alan+turing+the+enigma+pdf+free+download', suggesting a lure to download a PDF, which then leads to a malicious redirector. The presence of numerous other PDF links further supports the SEO link farm heuristic.

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/pify?keyword=alan+turing+the+enigma+pdf+free+download
    • http://files.myqse.net/uploads/1/3/1/6/131637043/kozajosematewak.pdf
    • http://files.richardsnyder.net/uploads/1/3/2/8/132815298/9319644.pdf
    • http://files.alexandrakulick.com/uploads/1/3/2/6/132681901/sovokixuropiwu-fibanimutoki.pdf
    • http://files.keyspeechtherapy.com/uploads/1/3/1/3/131378990/kiradobud_modawatibad.pdf
    • http://files.mdrewery.co.uk/uploads/1/3/2/6/132696465/gosaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/95508003242.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/mendelssohn_wedding_march_sheet_music_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/application_form_for_loan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/5671547118.pdf
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/amblyomma_hebraeum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/81732025616.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/devovubedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/69875203488.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/76858035911.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/mukutoruxipabusorigar.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_off000048fe.bin
2ff1ff9c9c02fdc198de996b500dfce34ebe966941d042df83c7d453c4f05be9
pdf-font-stream PDF embedded font (sfnt) at offset 0x48FE 5360 bytes
font_01_sfnt_off00005b1b.bin
634432371e32031d5fe3c51ee96d35ff231825835e404c110a38da4517e3fefa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1B 9768 bytes