Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffd0bdf2bde714f…

MALICIOUS

PDF

31.4 KB Created: 2020-08-05 05:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2b4886925009c434a4aee3781b469d1 SHA-1: 0d432a476a5ed67a456735ca2f8e9b636036809c SHA-256: 2ffd0bdf2bde714f96a0caff524a0daef399cb57a562d3897e3dca3c6ca4efc3
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arctic+word+search+pdf', suggesting a lure related to a word search puzzle to entice clicks. The ML classifier also strongly indicated maliciousness.

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=arctic+word+search+pdf
    • http://files.mmandmcatering.com/uploads/1/3/1/1/131163872/lupeleg.pdf
    • http://rokewa.benjaminthieme.com/uploads/1/3/1/8/131856919/5f1d73f.pdf
    • http://files.megacandyimporters.com/uploads/1/3/1/4/131454459/jujulerupubaze.pdf
    • http://files.salonboho.com/uploads/1/3/0/7/130740068/fda8d6909b23.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/15376700044.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/ladegeranafe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/nowapuzadeterudona.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/vavonugikid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/tofafebidegivetamura.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/96246786256.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/vuwetefuvafetogadetasu.pdf
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/basic_computer_training_file.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/ecological_economics_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/romuwesuwonajixodaze.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_off00003fd1.bin
b6193e530da29f28a82f1469f5abded8092944d09277c4ab50b15d50544987c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FD1 5292 bytes
font_01_sfnt_off000051e0.bin
ddf787c76d978e9eccedcff81efa5a73ff050e33115df6dafbcdd8ca59257d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E0 9180 bytes

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