Malicious PDF — malware analysis report

Static analysis result for SHA-256 883d5bb97a66ceb6…

MALICIOUS

PDF

52.1 KB Created: 2020-09-01 13:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1fa644e28cdf90fab57361e1a3e4612 SHA-1: b31b16e1ac315dec9c2215cf01c327e2cbd4b0de SHA-256: 883d5bb97a66ceb6693bd1bd897c7b5a10b5927d0e4a9e922b57be7699990cae
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The presence of a visual download button further supports the lure. The primary malicious URL is https://ttraff.me/wix?keyword=enharmonic+tones+worksheet, which redirects to other benign-looking PDF documents, likely to obscure the malicious intent.

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.me/wix?keyword=enharmonic+tones+worksheet
    • https://static.usrfiles.com/ugd/83f04e_f1b13a535d744ba18ace4a0c5b820940.pdf
    • https://static.usrfiles.com/ugd/f09a9d_60595ac03568422b9a6eac05f5bbe687.pdf
    • https://static.usrfiles.com/ugd/b8c837_50de56314d6148a9a7aeff2e45a672c9.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/larufufadenuluma.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/css_transform_antialias_text.pdf
    • https://static.usrfiles.com/ugd/d4da64_7246443571fa466a9bc297031a2dad1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf36f6b73d654dffb9ad9e1c2509dd58.pdf
    • https://static.usrfiles.com/ugd/98e298_b8732a3be3254b14b9adae8d64778447.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/91157794733.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052d1.bin
d66498ebc792f58aa0ee8d5764d41e6c33d335e1c2885b6e47ef14975ef9a378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52D1 6480 bytes
font_01_sfnt_off000062c7.bin
c14c6cb24b2c31af7e99d2c12fe27df8a44e26e4c82e30f9e2ad233a844dd8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 4908 bytes
font_02_sfnt_off00007347.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 1800 bytes
font_03_sfnt_off00007bd5.bin
bad9546e2c989180267e12ab9e394633428b2d74def4c2c1ff1a6ef0d12de660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD5 10444 bytes
font_04_sfnt_off00009f88.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F88 16120 bytes
font_05_sfnt_off0000b46f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB46F 4324 bytes

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