Malicious PDF — malware analysis report

Static analysis result for SHA-256 28edfdb8a390faa4…

MALICIOUS

PDF

63.5 KB Created: 2020-08-22 01:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db1e11bd92362a217545ea12b7c03730 SHA-1: 15ee12012e04bb6a5099af13825cf9823c1aeac2 SHA-256: 28edfdb8a390faa497dd60b16af5faf82d27ba1727a283d87fca12e2fee5248f
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine rankings. One of these links, 'https://ttraff.cc/pify?keyword=trombone+sheet+music+pdf+free', is identified as a malicious redirector. The presence of a visual download button further supports the lure, suggesting the document's purpose is to trick users into clicking malicious links.

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.cc/pify?keyword=trombone+sheet+music+pdf+free
    • http://files.houseofenchantment.net/uploads/1/3/1/3/131397946/285d3731e68.pdf
    • http://files.sjichamber.ca/uploads/1/3/0/8/130813730/2755167.pdf
    • http://zagenumez.lisaruth.net/uploads/1/3/1/0/131070588/eabc5cf75dc56.pdf
    • http://luwixabed.hernfarms.com/uploads/1/3/0/7/130776031/5a042f9ee38cef0.pdf
    • http://pomova.kitchenettecuisine.com/uploads/1/3/1/8/131856005/627316.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/3846714873.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/pixeliremuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/32745464988.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/food_calories_list_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007792176.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/play_android_games_on_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/flash_player_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/2678855990.pdf
    • https://cdn.shopify.com/s/files/1/0439/0299/2536/files/60281662263.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/37558423889.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_off0000adc5.bin
4e047a3a06ba241c37d686c7cb0b7982a525c4a2483cacff0ecb65cfeda1c0a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xADC5 5124 bytes
font_01_sfnt_off0000bef6.bin
6571f431c5944d495eaf560bf2f10f9659e1882a8b68923d1845f476c3a26fe8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF6 10712 bytes
font_02_sfnt_off0000e2fd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 4324 bytes