Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3241bc0caffd7d…

MALICIOUS

PDF

38.2 KB Created: 2020-08-31 14:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d0a0894022e2c37e2fbcca36779a79f SHA-1: 25ceb518f5ae536d362ba8fd3f4a189158d0bbbf SHA-256: fd3241bc0caffd7df6dd45c1840c92dc521ff171ccdd9b5a03a8599be05e9a0a
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the redirection attempt.

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.com/wix?keyword=music+definitions+worksheet
    • https://static.usrfiles.com/ugd/0c41e7_8f1ff589178e41d796f8a1ccd980227a.pdf
    • https://static.usrfiles.com/ugd/d78803_7cb0e9dc041145bb83eb69fcef2a4161.pdf
    • https://static.usrfiles.com/ugd/b8c837_acb377122f174942975dd9f44d648a55.pdf
    • https://static.usrfiles.com/ugd/23b571_4b34d0aa554843dea1d1c25216e69f06.pdf
    • https://static.usrfiles.com/ugd/9cc572_417f08a3637543b3b1e79251028b4570.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/vozamipikomozub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/44898189050.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/nejufiwitepulogaxodo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0968/5157/files/alan_turing_the_enigma_andrew_hodges_download.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_off00005862.bin
79a47ef70a0056a73914522d5e9ecc48be0aaa4382b875cdfe2719ec233de403		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5862 5028 bytes
font_01_sfnt_off0000699b.bin
b7b0874b5d3aaf0535148f40551a032975edde306c766f0673295791b28dc4c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 10232 bytes

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