Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36437d157e625f6…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 03:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa91e76b867445b8afe38e577908ca3c SHA-1: 5c3658c55c0841b804eeb1386d45707fd89b7014 SHA-256: b36437d157e625f67cd13edb5c15755bb29ce147dad81190b8bf9df984a3255c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to PDF conversion and the malicious URL. This suggests a social engineering attack aiming to trick users into visiting a malicious site.

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=convert+pdf+to+word+using+apache+poi
    • http://files.andrewpoppleton.com/uploads/1/3/2/7/132740413/0701942.pdf
    • http://files.ishtaryasin.com/uploads/1/3/0/7/130738956/lufowuwabem.pdf
    • http://files.stillpointcentre.org/uploads/1/3/0/7/130776366/bifinew_jowawuzavux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9543/3117/files/26604919883.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/nuregu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6918/4931/files/51647688713.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/tikefatu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/18142359805.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/23864360609.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/lutebusavimavob.pdf
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/dukexedolulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/tefogovidukogaxukekirasoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/puposak.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/vituma.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/96528443982.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_off000067dd.bin
8a8564e060b80daafabc923ae3bd4e12056a91ddc900579c6387ce2f87bb8543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DD 5444 bytes
font_01_sfnt_off00007a72.bin
e89fe0a5fa17dddfe4913afb1b220016767d0565be4b7c86b6c44b71733dcd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A72 10656 bytes

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