Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb7abc15b8db81a…

MALICIOUS

PDF

56.2 KB Created: 2020-08-09 09:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b8ecd0c7484b83a851b09a24466a68f SHA-1: c4b5ff0eb4c6d59771b9309d1193d3dbc7a5d0c9 SHA-256: 4cb7abc15b8db81ad87548705840a2739a3e14737d7587fe3985108ea7da7d49
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=analytical+reasoning+topics+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The file also contains a large number of links to PDFs hosted on Shopify, which is flagged as a link farm. No scripts were extracted from this sample.

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.cc/pify?keyword=analytical+reasoning+topics+pdf
    • http://files.imarsonline.com/uploads/1/3/1/3/131380413/6c76ebc2.pdf
    • http://files.lynnvalleyturnings.com/uploads/1/3/1/1/131163836/menekezozi_dinij.pdf
    • http://files.yoursongstory.com/uploads/1/3/2/6/132682528/sijalerajo_duruvolesabej_duvuponeno_ronuxufenov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/90497395500.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/jakuromuloxamozobas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0359/files/esl_articles_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/44637645056.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/ps3_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/77055037234.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/gixamofibopepator.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/zatajemaxagovopufen.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/babejekek.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/29428590164.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/98276632711.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_off00009dd0.bin
c5b865177a0a1293d36de5e904cfee3d66d2933ab69553ca0fe9d0c08edf80c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD0 5416 bytes
font_01_sfnt_off0000b059.bin
9b773f82b4a37fdcd7198b30cfd8afccbfd36939d69783af9393e477a86a15d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB059 10376 bytes

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