Malicious PDF — malware analysis report

Static analysis result for SHA-256 5690b3d49ad5b1e2…

MALICIOUS

PDF

49.4 KB Created: 2020-09-03 22:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b113cafa7b0f2fd5791646c13fd7506 SHA-1: f7843d84250574af32daef563c64d27eaf7ff000 SHA-256: 5690b3d49ad5b1e2f995a7b22db45428112db43a6c7d16261e98fa8e0a5f379b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger SEO poisoning or link farm operation. The embedded URL in the document body, 'https://ttraff.club/wix?keyword=arduino+arbitrary+waveform+generator', confirms 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.club/wix?keyword=arduino+arbitrary+waveform+generator
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/vusamenojevibigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/template_joomla_3._8_free_responsive.pdf
    • https://cdn.shopify.com/s/files/1/0437/5330/8314/files/90231303778.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/xigajad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7333/files/carbon_copy_cloner_5_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/lugizurigenuwisama.pdf
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/augustine_confessions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/rizibajemomulanuzo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nuxusepumidof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/nigadifipusexeragatabotuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/erik_erikson_theory_development_stages.pdf
    • https://cdn.shopify.com/s/files/1/0461/2154/9988/files/fasopofofivenovilupijiji.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_88c52c6767574ae5b3755e5e010b6337.pdf
    • https://static.usrfiles.com/ugd/a31856_6f6351dd51a441fc8ad7285d88e73d86.pdf
    • https://static.usrfiles.com/ugd/b8c837_64df84e35a654103865d3f2689747e08.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_off00007f7d.bin
dfc23ba0325d45cca44f7ca1ee988c0cdf12825e9d2df486ea82a0a6f8338d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7D 5400 bytes
font_01_sfnt_off000091ec.bin
60fefaf3bf79f6d24d6c546ede8bf61ddbeafca274b07f0dfa71c57a0bf0118a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91EC 11840 bytes

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