Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea1e0df8ad0c0c3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 20:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b250663a0c763f586359852ccfc2fed0 SHA-1: d88081b5672f562b518335bfbf1f336c69bb5e0b SHA-256: 4ea1e0df8ad0c0c33a84de4b6ad6cb3945a3f702ea43522d1c28eaf1b7a801f8
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to unknown or potentially malicious domains. The document body, though partially corrupted, contains the same malicious URL. The primary intent appears to be redirecting the user to malicious infrastructure.

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=coordinate+picture+graphing+pdf+free
    • http://mupib.procarers.com.au/uploads/1/3/1/0/131071252/miduwimejuf_jatibudunofowi_lananimepej_piripar.pdf
    • http://nujefog.travelwithkara.com/uploads/1/3/1/0/131069934/6216641.pdf
    • http://files.richardsrobots.com/uploads/1/3/0/7/130738771/2a06e1.pdf
    • http://fosur.campsolofthedeaf.org/uploads/1/3/1/3/131383544/edb5a392.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/apj_abdul_kalam_autobiography.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/disciplinary_action_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/bsc_3rd_year_inorganic_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5689/6927/files/gixuxowuduboxatoru.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/semibaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/ffxi_how_to_change_screen_resolution.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/43734213265.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3697/files/36814741954.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/nixosizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6993/files/gubupekekefezaxe.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_off00006285.bin
e0587337be11fc134f6518d480c4268b96183fefda3f35f8af11d85251885c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 5112 bytes
font_01_sfnt_off000073e2.bin
4ec28508466fd79329c6ad2389645e6b3bcee3f9346a24ad1fe80e95c734c1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 9964 bytes

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