Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b3b26514f5d043…

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 02:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea30ec455d5ed70758d639558bbb058 SHA-1: 2f5c7ab461733ece5abc67eb1dd330b744880e65 SHA-256: f3b3b26514f5d043261de2b48980de945990217b0ff4777d2f790bb0cc330873
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a book title. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the ML_NYX_PDF_MALICIOUS model strongly flags the document. The embedded URL is reconstructed as 'https://ttraff.cc/pify?keyword=give+me+liberty+an+american+history+5th+edition', which is a clear indicator of a phishing or redirection attempt.

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=give+me+liberty+an+american+history+5th+edition
    • http://files.teaching.yfolajimi.com/uploads/1/3/1/8/131871501/32c5567d32.pdf
    • http://wopimine.balibidadaritours.com/uploads/1/3/2/6/132683001/68c5996948.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/jigebed.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/bumasokisawekigepujajifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2703/files/halo_wars_mods.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/the_anatomy_of_cavus_foot_deformity.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/44321654496.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7746/files/moxod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/fujiforu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/tugugojugotejupufinumomim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/robidemuwujiredetegudikin.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/9105712088.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668f.bin
9a37f823d6bb9355f64c75175ff80006402128885a2b7ff33f8cdcf4b6ae2120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 5636 bytes
font_01_sfnt_off00007991.bin
50d91c6f6ae48f080817ed12933f530b4f83c40e72c506187f6c062cf748e30c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7991 10148 bytes

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