Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19edd2ef38f6cc8…

MALICIOUS

PDF

41.1 KB Created: 2020-09-01 04:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0df8f07c9e7e7e694a1990066941844 SHA-1: a4142e8b2df5cb9cce656419250b68760e2191b1 SHA-256: a19edd2ef38f6cc8d33c3be496424d373c8b472cc76b006abd5cd70ece0a9715
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of these links points to a known malicious redirector, 'ttraff.cc'. The document body is heavily obfuscated and contains a URL that appears to be part of the link farm. The presence of a malicious redirector suggests an attempt to lure users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=stay+in+touch+more+formal
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/tafenuzenuvejofavuri.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/sifudexenofowixiriwetuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/89868306949.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/wulorakufir.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/zowot.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aeafbef4f54d0883ca3820e25ac78c.pdf
    • https://static.usrfiles.com/ugd/95089d_d9400aafd48c4f168a7f0b65ea73fff4.pdf
    • https://static.usrfiles.com/ugd/5a1791_c0af1920c137443c922d281af80dfc49.pdf
    • https://static.usrfiles.com/ugd/3f4b99_a7bbfab454be40fdae1564a965b509d3.pdf
    • https://static.usrfiles.com/ugd/c8a981_43b43e734bfe48e4b74f9761060f0efd.pdf
    • https://static.usrfiles.com/ugd/badafb_fab5d154a03e4c818e21a47b607ae65d.pdf
    • https://static.usrfiles.com/ugd/e643da_33f1ffaa14ee4fa7b278a02ff35f4dca.pdf
    • https://static.usrfiles.com/ugd/b8c837_611caa82a29c45a59f7a9325be861f50.pdf
    • https://static.usrfiles.com/ugd/0cd019_a2912301029743b4ad59a3e8387c49e5.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_off000062de.bin
7d91805a078af16b6fcb9f540b5c969ec258ccaaad21b542e4a2045a47dd320b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 5148 bytes
font_01_sfnt_off00007441.bin
2dddeafb14ff40fcc59f921d43d32076401b94654cf366ba8a6899f5cd8ae7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 10444 bytes

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