Malicious PDF — malware analysis report

Static analysis result for SHA-256 97705a8143f9d40d…

MALICIOUS

PDF

40.9 KB Created: 2020-08-22 21:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea8ce101bb2015ae68e094933e1044c SHA-1: ef24d653ca095122c874757ff540aca9ace57896 SHA-256: 97705a8143f9d40de3e3836c166b9922c5ed056a75ea48ffa04d5c809afa6245
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to 'Croma app for pc' and embeds multiple links. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to deliver a payload or phish credentials. Another heuristic flags a PDF link farm, with the primary link pointing to a Shopify domain. The document body, though heavily obfuscated, also contains the 'Croma app for pc' lure and the 'ttraff.com' URL, reinforcing the social engineering attempt.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=croma+app++for+pc
    • http://jakaxoro.fullwavemusic.com/uploads/1/3/1/4/131437502/2802688.pdf
    • https://cdn.shopify.com/s/files/1/0449/3754/3848/files/basic_business_statistics_13th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/rawurolojefabe.pdf
    • https://cdn.shopify.com/s/files/1/0462/2024/7194/files/positive_affirmations_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/jariw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/bekadizijusimakek.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/hdfc_ergo_policy_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/22066364872.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/24261385067.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/pagobatilulusidi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/getarejo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005968.bin
1996ec9a064a630fe38b3db77df6b5c111b40e1be589cb7721bc9ed54097e2e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5968 4412 bytes
font_01_sfnt_off0000684c.bin
dcba43fa70c65ddbb2f2f9abc9271d48c4d797a5c6503328f13754097efdce78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684C 9684 bytes
font_02_sfnt_off0000896e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 4324 bytes

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