Malicious PDF — malware analysis report

Static analysis result for SHA-256 787f545c77ea86dc…

MALICIOUS

PDF

42.0 KB Created: 2020-08-21 00:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7832108af953ff07bab828b565c65d0e SHA-1: a00287676efe773c2cfde4cb663787a9adf7455c SHA-256: 787f545c77ea86dc896a9894762a40b32b00678595bfc2f075bc9450d661a8a3
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The primary intent appears to be directing users to the malicious redirector.

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.ru/pify?keyword=briony+fer+on+abstract+art+pdf
    • http://xokeve.rockinghamlimo.com/uploads/1/3/0/7/130740178/4726791.pdf
    • http://files.jeremywolin.com/uploads/1/3/1/4/131407227/9155308.pdf
    • http://files.thespeechspacedc.com/uploads/1/3/0/7/130775655/mobuv.pdf
    • http://files.velez.com/uploads/1/3/1/3/131398100/1500944.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/46889047641.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/motesif.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/bluetooth_microphone_for_android_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/11412095919.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/12501074494.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/28318466973.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/sowoderixediwurawasop.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/python_import_from_directory_above.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/kizugiwejabuwima.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/3dmark_11_physics.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/21506670784.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_off00006724.bin
47d1cff3d0a2c5f45ed6b4d5245f26994953a3f322712d483cac50ee71345d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 5408 bytes
font_01_sfnt_off00007993.bin
bdf5126e18cfd9f6a5594d0a260f8c4e09d9b8ae351f3b39611e88ad45f86f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 9876 bytes

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