Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88dceeddb97dda2…

MALICIOUS

PDF

41.3 KB Created: 2020-08-08 04:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba23bfc2bd2c3185b5348a356310ab31 SHA-1: 71b59d3dc405f097ee9a85cb8699a5ca61d04fd6 SHA-256: e88dceeddb97dda218b686281a14c51c82726a9b27bb7348357e7d1721862e1b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a title related to mathematical formulas, likely a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm used for SEO poisoning or to obscure malicious destinations. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=all+formulas+of+ap+gp+and+hp+pdf
    • http://files.lancasterlimo.net/uploads/1/3/1/3/131378899/tuwulaxobubub.pdf
    • http://files.doggiedashabout.com/uploads/1/3/1/6/131636834/xomutupituw_xabunevawukag_julimibuvigotog_paxojezijufisif.pdf
    • http://files.benoitfarmsandlivestock.com/uploads/1/3/2/7/132740185/tukuzukor-vuragodinamo-mepazigide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/niloduxumiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/mejomotazoxuruziguj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/16109294541.pdf
    • https://cdn.shopify.com/s/files/1/0434/4637/0471/files/wadomak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/pifezalofenidusasepadi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/92595430881.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8504/files/58002386315.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/wasiripejeniju.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/pezuzudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/gogefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/jizoladufarafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/38799286802.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_off000062b3.bin
8955223890ec60e1de29e2f16022bc4e217c161872cc873233cc11ffbc037442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 5444 bytes
font_01_sfnt_off00007505.bin
180f6dcf6286c0fd5da5a57502d59c93086e655c728c9663cb4644c06e975557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7505 10324 bytes

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