Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb75d980a63fc28b…

MALICIOUS

PDF

45.2 KB Created: 2020-07-30 18:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af34b67ffd0af95a7eeb534de230d45b SHA-1: 7d71122aa0d6a1e89f78d74c023634fdcf559f3a SHA-256: fb75d980a63fc28be39c6be1ecbcc2d5acd4a7a2dc36492e81d4847b5d292451
128 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, which is further supported by a PDF SEO link farm heuristic. The document body, though heavily obfuscated, contains text related to 'paper cutting templates pdf' and mentions 'wkhtmltopdf', suggesting a lure. The presence of a 'download button' heuristic reinforces the social engineering aspect. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=paper+cutting+templates+pdf
    • http://files.roundhillat.org/uploads/1/3/1/8/131858287/viwutolo-muled-lozikexane-dakudax.pdf
    • http://files.sweetchildofminephoto.com/uploads/1/3/1/6/131606343/piwitipixo.pdf
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • http://files.arlenemurphyart.com/uploads/1/3/1/4/131408209/damosex.pdf
    • http://files.joseluisperezjim.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/85523310895.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/sakuroxajipixageni.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/vujerapobu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/musixifofojanitem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4590/2746/files/fozazuxoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/44417825655.pdf
    • https://cdn.shopify.com/s/files/1/0433/7637/8014/files/sonufobowobenefap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/61944459529.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/bexakogumumekobomatidas.pdf
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/voxeveruxuwujozenepug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/32943836987.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/vanililola.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/lurulupawopiniluzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/68556229567.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.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_off00007431.bin
74bab87b0e6de26c6c77e8ca291696ff348e9318ce2b53a03cdf17eb7a4e540f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7431 5248 bytes
font_01_sfnt_off000085ea.bin
bc119377c448887100ecd3c54df2aa10fbceb740edb89951cdf1296d33eb6d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x85EA 9788 bytes