Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b804571e2fb23e2…

MALICIOUS

PDF

89.4 KB Created: 2020-08-05 17:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05a763d2a2f31aa7edb5a600f998fd30 SHA-1: 331aacb95c6df1298519a357617b11c482fda128 SHA-256: 4b804571e2fb23e2e8ce28e6b72bd6a8c27474577fb88a6e0b3d00c8995c1c3a
150 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=afm+microscopy+pdf', which is also flagged as a malicious redirector. This indicates a phishing or social engineering attack aiming to redirect the user to 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.cc/pify?keyword=afm+microscopy+pdf
    • http://girivebal.jaclynjaramillo.com/uploads/1/3/1/6/131637316/5427738.pdf
    • http://files.alessandracassar.net/uploads/1/3/1/6/131606046/9161578.pdf
    • http://files.thcofe.org/uploads/1/3/1/8/131856757/5215631.pdf
    • http://files.wrightfiredistrict.org/uploads/1/3/1/4/131408117/bisolefoladuki.pdf
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/tafigap.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/bawoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/fleetguard_filter_cross.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/98589829191.pdf
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/ruguwalabutavogavutuzexe.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/tipping_point_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5350/6969/files/56707722423.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/pixibisudawobigafajavaxot.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/31479112496.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/fejijom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/32263726027.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/sociological_theories_on_poverty.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/11832863641.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/kosevimanurepawagojurim.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/22773493448.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_off00010be6.bin
96a5a6f08625a13335182e4e0cc3e928ec05d1b4fb5c864dc674feb70274b551
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE6 5152 bytes
font_01_sfnt_off00011d6c.bin
fada3434d7f6089d2abcefdfaa781cf8fb93bf627c3824b2d1003cf2c79e4003
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 10812 bytes
font_02_sfnt_off00014297.bin
727fd0496b683259edbcf2806dca386b9f56573af1033b03c04a7cb46f056138
pdf-font-stream PDF embedded font (sfnt) at offset 0x14297 16156 bytes