Malicious PDF — malware analysis report

Static analysis result for SHA-256 864e4d0b57daf4d6…

MALICIOUS

PDF

38.8 KB Created: 2020-08-07 13:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 065ce09b78c8eecf5a499cbc498a3cc0 SHA-1: 0ed5dea6cc04d71e4506efb89531292bedeacc38 SHA-256: 864e4d0b57daf4d68f92880a16d705cb0763fd4d9a9d74ee73f5c1f7fb7f9ee5
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=carte+du+monde+vierge+pdf+gratuit, which is likely used to redirect the user to a malicious site. The document body, though partially corrupted, contains references to the malicious URL and other benign-looking PDF links, suggesting a social engineering lure for free PDF downloads.

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=carte+du+monde+vierge+pdf+gratuit
    • http://files.learnlikeapirate.com/uploads/1/3/1/0/131069819/vudiburon_zuramofonitidof.pdf
    • http://files.the-circle.ca/uploads/1/3/1/0/131070722/5a87eb377df2894.pdf
    • http://dejowego.getfocuscounseling.com/uploads/1/3/1/4/131407089/5654889.pdf
    • http://files.meadowcroftnorth.com/uploads/1/3/1/1/131163969/loriwupa_texaderowu_kajaxapefomifi.pdf
    • http://files.whitegallowaysofwayby.com/uploads/1/3/0/8/130873907/fewubogukobavel-sixomolimu-mifip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/33837458315.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/vujimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92835403356.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/exploring_management_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/65083866261.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/14326168111.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/97976650782.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/ancient_egypt_map_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/cause_and_effect_matrix_for_fire_alarm_system.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/html_to_android_library.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7914/files/36453261834.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/11859261132.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_off00004b66.bin
0224fba4c6da3aec16cf743c135e395c87d83af863e66a08a3ce958706ee1666
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B66 5116 bytes
font_01_sfnt_off00005cc6.bin
0b491fb1ed24e0e818592f55305e5658e0df4704bf6a18f0840425ddb21074a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC6 10380 bytes
font_02_sfnt_off00007e4e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 4324 bytes