Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfc8a87a404a710…

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 05:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b4d631f10dd5c8088184890f39ca05 SHA-1: 988a04b199f79998f8b3058ab6b5debd02f1a0a3 SHA-256: acfc8a87a404a7104118234eaf4f795c8f3416fbdffaaa42141c4cff4a3e2adb
168 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic firing for a browser extension installation lure, indicating a social engineering attempt to trick the user into installing malicious software. It also contains a critical heuristic for a malicious redirector link pointing to 'ttraff.com', which likely serves as a landing page for the malicious download. The document body, though heavily obfuscated, contains references to the redirector URL and numerous other PDF links, many hosted on Shopify, suggesting a link farm designed to distribute the lure.

Heuristics 5

  • 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
  • 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.com/pify?keyword=java+121+32+bit
    • http://regur.evmpforum.com/uploads/1/3/0/8/130873822/sijadalupiset.pdf
    • http://lufironel.theyellowvanfurnitureco.com/uploads/1/3/1/8/131856998/309063af6b.pdf
    • http://renumozu.sherrildouglas.com/uploads/1/3/1/4/131438464/punirubejal_detemotugezo.pdf
    • http://files.hamilocoast-picodeloro.com/uploads/1/3/2/7/132740270/semawesebuvidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/41014039948.pdf
    • https://cdn.shopify.com/s/files/1/0462/6654/8373/files/kepefevoferubopopeka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6510/5814/files/tarrega_carnival_of_venice.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/critical_appreciation_of_ulysses.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/61350010004.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/aha_cholesterol_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/gaxegizelurilotoneze.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/65938652716.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/barnett_vortex_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/ncert_science_class_6.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_off00006cf8.bin
e2b40a98a0f2dbfb20b2fb89963c6ce62219f6ce5d669d9420c15a9ae0328509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF8 4912 bytes
font_01_sfnt_off00007dcd.bin
6ea6b5ff4b910d9255484608324dac5eb320fa82242bc8257c3a7628196c3849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 10192 bytes

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