Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a22ce0e716bd4e…

MALICIOUS

PDF

46.5 KB Created: 2020-08-03 22:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ff7c6ab2ff459e109095cb9e5c982e SHA-1: c6d499efc3079d2684cf7dd66ea11d1e2a2c8531 SHA-256: a0a22ce0e716bd4eb6d1550795446733f1a890df3b32d5c83dbf89bb5cf0c7a9
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to lure the user to a malicious site via a link.

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/pify?keyword=enzyme+biocatalysis+pdf
    • http://files.dipvac.org/uploads/1/3/1/4/131453494/juzepenufiji_jisodawep.pdf
    • http://files.artglassforumny.org/uploads/1/3/2/6/132682471/kilamodorutewa-zitaw-wisotibe-falanamegeza.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://files.gowacambria.com/uploads/1/3/1/0/131069832/3dacac2.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/vateno.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/jufimilabireso.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/zexowenor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/72737731771.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/vomuperiviwukepepigan.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/jukekodikorubuwoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/puduvipe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/bijuwusetijasumija.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/95638601084.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/pumesesafiwobenun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/1212233559.pdf
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/kurumu.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/files/1/0427/4028/5607/files/bijuwusetijasu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007703.bin
39761be81de6c5ddc8e7dfe0c23d74b8df0718102b461a911f99ccd59141207d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7703 5452 bytes
font_01_sfnt_off00008994.bin
c8510374e81671ab27298ff371d8f8c6dae7cc8b9b0f8d74b8186596d6f3fccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8994 10260 bytes

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