Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6df3ebb6cbda25…

MALICIOUS

PDF

53.5 KB Created: 2020-08-12 09:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdfa58e20df7a8b0eba2424beb92f2e0 SHA-1: d4d0a24bec7b2ad299ecf6185d777edb804c2400 SHA-256: 3f6df3ebb6cbda2561dcbffaf222bc0aef1952fb5c03fe97a0706455ef3bca93
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to seemingly unrelated PDF files hosted on Shopify. One prominent link, however, redirects to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Oxford dictionary of synonyms and antonyms pdf download' and the malicious URL, suggesting a lure to disguise the redirector. No scripts were extracted from this sample.

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=oxford+dictionary+of+synonyms+and+antonyms+pdf+download
    • http://files.mitchelletteandassociates.com/uploads/1/3/0/9/130969048/f622f5224ae2c.pdf
    • http://wepugaf.texastyp.org/uploads/1/3/1/4/131410007/jezawaboguguf-kamiwefab-xuwadu.pdf
    • http://files.omahawarrior.com/uploads/1/3/1/8/131857465/fuwomozivuj.pdf
    • http://files.lizannbassham.com/uploads/1/3/1/4/131453252/rikawaz-puvuwej-tewagaka-wemenokoru.pdf
    • http://files.bshelart.com/uploads/1/3/2/7/132741397/bbcd2276f95856.pdf
    • https://cdn.shopify.com/s/files/1/0435/2278/5444/files/genetics_neet_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/quicken_loans_arena_seating.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/hydrothermal_metamorphism.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/ghatna_chakra_2020_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0446/6973/0979/files/astrobiology_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/oriflame_catalogue_february_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/84236534780.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/kawojizojanuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/37407449998.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/fovigebeno.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/99119297308.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/63921781920.pdf
    • https://cdn.shopify.com/s/files/1/0439/5030/9531/files/13810153195.pdf
    • https://cdn.shopify.com/s/files/1/0434/7327/2992/files/futolopamuxupuzil.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d50.bin
c891de505a542f684182210e3dcf62f9ae0455da3c80922bab774bfb64de9983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D50 5260 bytes
font_01_sfnt_off00007f30.bin
0c82973f51f2bdd63d2158dea7590e59ece7eb1604d566d039ba78100ac96a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 10624 bytes
font_02_sfnt_off0000a3ac.bin
49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AC 16544 bytes
font_03_sfnt_off0000b9ef.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EF 4324 bytes

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