Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac58acff3f3a6e5b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 12:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a74b1f687cde16501726fd753a162a71 SHA-1: 6335f5da83dccc864b101f4b31e667401aa4aa39 SHA-256: ac58acff3f3a6e5b7a7ee7d225149d563bf1e3b7c5f19ca5c0ebbafb0b749a66
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=barcelona+metro+map+english+pdf'. This indicates a phishing or redirection attempt. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Barcelona metro map english pdf', further supporting the phishing pretext. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=barcelona+metro+map+english+pdf
    • http://nexebo.mkeddleman.com/uploads/1/3/1/4/131438044/fadosujugudube.pdf
    • http://tinafeza.randolphwalters.com/uploads/1/3/1/6/131606490/rijol.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/pisutirawexuborir.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/fexiwivoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/rowesixevo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0736/7592/files/30976249028.pdf
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/plant_systematics_simpson.pdf
    • https://cdn.shopify.com/s/files/1/0453/2230/5691/files/speed_velocity_and_acceleration_problems_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/98734686619.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/53078113072.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/85554843030.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/bufirezaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/sujamalesewejovakepuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/letter_worksheets_for_preschool.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_off00005d78.bin
3cc984ebf3ddf09281d529c8a05083455889cec08e84443d3c98c9cf22da631f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D78 5616 bytes
font_01_sfnt_off0000705d.bin
1c318688cf89ad496da519bb1dc3836cafc469cee51ebdea90f666a9ea23153a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 10220 bytes

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