Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6112f388930939…

MALICIOUS

PDF

35.4 KB Created: 2020-08-29 22:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ef95adce53b116d99e1e904fa5a7899 SHA-1: a28c12f794ccce72602fa7491bef1a57ae2a8ed0 SHA-256: 7a6112f3889309397355ab4d2c176d226cd74951962fac2fa1fd5220ae94c2ed
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and links to a known malicious redirector, ttraff.ru, which is disguised as a free PDF download. The document body and embedded URLs suggest a SEO-based lure to drive traffic to malicious infrastructure. No scripts were extracted, limiting the ability to determine further payload delivery or execution details.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.ru/wix?keyword=astm+b117+pdf+free
    • https://static.usrfiles.com/ugd/b8c837_88b9ef4220b64299b85ebb8981df6e3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d481109ebff045f2aeded6ef80821e5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfe2ad1adfcd4f928cdced644920cae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_404531e346b44571b85ab469ac98a2ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_da641bfb739c4c13890db8ffbc1f5b1d.pdf
    • https://static.usrfiles.com/ugd/60933b_adc8bfd32c634a8daf8f95f0c1981a77.pdf
    • https://static.usrfiles.com/ugd/b8c837_26450e6b92e34791a8b4ded296ad509b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/xoxibezokigifelem.pdf
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/4318706739.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/free_ccna_labs.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/analytical_chemistry_by_gary_christian_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/1733/0842/files/pitajobetowavumakato.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ef9415b4b294dcaaa39da061d2f9bae.pdf
    • https://static.usrfiles.com/ugd/b8c837_b45adb783ca347aa864882c616feae88.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_off00004c49.bin
c5d9a98debdcb7d91e3dd98c0fd8fd43b81f418147d011a52a7be0a0e5d05082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C49 5204 bytes
font_01_sfnt_off00005df3.bin
5545df6c85b5a4f9b1ec09931dfae21687587e8205597765444a6f1affad2fb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 10392 bytes

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