Malicious PDF — malware analysis report

Static analysis result for SHA-256 9326dd79aa227550…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 02:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ad2cf5c439057d078fdbc0782e4f35 SHA-1: b78f0254eb6c4eeffa1a3eb64c3ca9ca2dc48a9c SHA-256: 9326dd79aa227550ebb13fa3419aa96f0b30b9e02f7deba52d008eb85688e817
150 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, disguised as a research paper. The PDF also exhibits characteristics of a link farm, with numerous external links. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be social engineering through a deceptive document.

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/wix?keyword=research+paper+on+artificial+intelligence+in+medicine+pdf
    • https://static.usrfiles.com/ugd/a6e5e9_f96e7e04a76d4f0da2ab9b2780dee928.pdf
    • https://static.usrfiles.com/ugd/b8c837_963d92698c7844c393e7377a5d1421e7.pdf
    • https://static.usrfiles.com/ugd/d43733_ad8a7e0e2e4e480d9b1bc6fd2917f941.pdf
    • https://static.usrfiles.com/ugd/b8c837_b773e220c0374784937e1a949d98038a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3635a1af29d649b2bb88033299c6ccbd.pdf
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/blackberry_picking_poem.pdf
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/jibokibipemetigixafakuzin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7633/8335/files/horde_1-_60_leveling_guide_classic.pdf
    • https://cdn.shopify.com/s/files/1/0432/6090/3582/files/gutovisir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/audio_songs_app_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/tareguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/68077114925.pdf
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/87831160204.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/wamovirutalukuvaxe.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_off000065de.bin
869bc726212395641b5fe726c724b3725f6982f24850772450d1f9026c2f47e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DE 5576 bytes
font_01_sfnt_off000078a5.bin
1c9a7d32cecba4f87a0a3b9883a2ac09e8fddfdd5a3b031ae068490c85fd43ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A5 10616 bytes

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