Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75205ea33913524…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 04:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52cc43a4823a29b4f81f104dcb0e5a23 SHA-1: 5aed4eca006e48c48d25dd9de9ce2ed9df1230bb SHA-256: b75205ea33913524c3e3c233ca232fb5e7c43de40264f9a3bd34c1aea54dd487
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to lure users with a keyword-based URL. The document body, though heavily obfuscated, contains the same suspicious URL and other PDF links, reinforcing the malicious intent. 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.com/wix?keyword=the+aeneid+robert+fagles+pdf
    • https://static.usrfiles.com/ugd/4725f1_588c5498d0444af487ad171feb71a964.pdf
    • https://static.usrfiles.com/ugd/b8c837_528317447e284e2898b0305cc4846d9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d449b3996d6457399ee79d7ab0a118c.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/forensic_accounting_journal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/11324264914.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7992/files/5913536683.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/biochemistry_mathews_4th_edition.pdf
    • https://static.usrfiles.com/ugd/6da380_c9c4757ed26d4c3f83564ce096b252f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_29e5d4c05720453e9c6e518904891e01.pdf
    • https://static.usrfiles.com/ugd/f63f29_a960c07477c14fc486ff9daf76a4967c.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_608cb76560944d5b92b6f0a1941e4752.pdf
    • https://static.usrfiles.com/ugd/ea2f88_52b5df1d34cc4b2f9418e2e68572fdb3.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_off0000690c.bin
8118efd77ce1d492ee5af75e24ded427518b99550919aae93f7132d496b266f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690C 5392 bytes
font_01_sfnt_off00007b56.bin
83bb3d7c80ec7d1984ffeb5ff03dcbe1b041e2af1e9729fb8f459598f398bf9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B56 10512 bytes

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