Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e9bf668627fa43…

MALICIOUS

PDF

50.9 KB Created: 2020-08-19 17:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a42229ab6e5c472af36bb12c7f80c4ce SHA-1: 7f24354d727b78f41bf1fb623ab91d67ac30d391 SHA-256: f0e9bf668627fa43b63fa2963fcc8239b4df2810fcfefe60725c963dd95b1ae4
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bksb maths level 1 diagnostic answers' and includes the malicious URL. This suggests a social engineering attempt to trick users into visiting the redirector, likely leading to further malicious content.

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.com/pify?keyword=bksb+maths+level+1+diagnostic+answers
    • http://files.lilyandjoantheatre.com/uploads/1/3/2/7/132740552/gipuxawoluwepi_bakiremovifupu_gutes.pdf
    • http://files.sshvug.com/uploads/1/3/1/6/131606256/8febbe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/26083960219.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/phoenix_az_zip_code_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/90479190423.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/active_listening_training.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/captured_by_a_better_vision.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/46007651251.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/74091673595.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_off00007130.bin
bac3e1e1b5391bb43edf5cb82e68b5af778b15a25adacad9ab32caad4ee874e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 5812 bytes
font_01_sfnt_off000084e7.bin
0bfbba66cd7af6fa2599062790b769047aef2a9ed7f5db976caea7e02a0171f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E7 10288 bytes
font_02_sfnt_off0000a85e.bin
49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA85E 16544 bytes

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