Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5e5c940cab2dfe…

MALICIOUS

PDF

40.7 KB Created: 2020-07-27 07:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 066c39b7794b427f0e30e5f3b3cb9863 SHA-1: 40205b28226a690d953386edb1f1cb2b6bbeff5a SHA-256: 2e5e5c940cab2dfec81430e3e3ce1440070bf9421b32cafb78f9d83aa8b26cf0
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or redirection tactic. The document body, though heavily garbled, contains text related to converting PDF to images and mentions wkhtmltopdf, indicating it might be a lure for users seeking such functionality. The presence of a 'download button' heuristic further supports the idea of a deceptive download lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chuy%25E1%25BB%2583n+t%25E1%25BB%25AB+pdf+sang+h%25C3%25ACnh+%25E1%25BA%25A3nh+online
    • http://files.paramountbic.com/uploads/1/3/2/7/132740343/c8cf232.pdf
    • http://files.mauitravelpartners.com/uploads/1/3/1/1/131164398/9644306.pdf
    • http://files.fondrentheatreworkshop.org/uploads/1/3/1/0/131070112/7331336.pdf
    • http://files.gemenvironmental.org/uploads/1/3/1/8/131857679/4122550.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/gexuvekedagajovigo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/dulaxafalixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/dedasemexek.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/rabelenabutagawemorot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/20358483480.pdf
    • https://cdn.shopify.com/s/files/1/0440/6801/2182/files/masoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/79411281035.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/47286819407.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/91162169268.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/19740611816.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/vubovevetadajetotapedan.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_off00005e8b.bin
7d5cda259228fd1f6d021b7878cd63824509807f4f2618069d9abb334d14478d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8B 5900 bytes
font_01_sfnt_off000071c2.bin
f4a4965a0904534773f40db5e5affa9c4c94e42fccb6d53bf6804cbd5b52f450
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 9796 bytes