Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa52cace6d6e628…

MALICIOUS

PDF

33.2 KB Created: 2020-08-15 12:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b9285123c222ebd949ef4399c0a45e SHA-1: 90fbc7fcce60eb9b3bb3d05a684d3a21936fd565 SHA-256: 1aa52cace6d6e628aacf8f41bfb2b283c6b6b836a091fa7e64508c9b8d016334
128 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.ru'. This URL is part of a link farm designed to attract search engine traffic, with many links pointing to Shopify-hosted PDFs. The document body also contains the same lure text and URLs, reinforcing the malicious intent. The primary attack pattern involves tricking the user into clicking a malicious link under the guise of a software download.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=wavepad+free++softonic
    • http://files.glomhi.org/uploads/1/3/1/3/131380687/81eddef2055ce.pdf
    • http://ramijas.alliesonthejourney.net/uploads/1/3/2/3/132303382/7fe5b78411eeb.pdf
    • http://files.themoxiexpress.org/uploads/1/3/2/7/132712006/lisiwebapil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/suvaveturifi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8321/6549/files/dularepilal.pdf
    • https://cdn.shopify.com/s/files/1/0441/0186/1528/files/71957820631.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/collins_german_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/kagerou_theme_overlay.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/91507073180.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/basic_electronics_notes_for_first_year_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/ownership_certificate_telangana.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/descriptive_writing_outline.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_off000046a3.bin
822e1670819ed198b888b7cc9b0072c59ea68ae472db4c954c538473417f4779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A3 5192 bytes
font_01_sfnt_off00005869.bin
4eddc37ed4ba0632825944ee5dd9c004a2253cff04b3bb15d9fd957b99a2adea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 9384 bytes

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