Malicious PDF — malware analysis report

Static analysis result for SHA-256 f378b50b9e773c92…

MALICIOUS

PDF

46.1 KB Created: 2020-08-20 00:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 139975dafb5fa1f9fd27fc45d2d91ced SHA-1: c3cd36115278ad83172e6ac212a9f85eecd2ec97 SHA-256: f378b50b9e773c925f50b0713496aa8978e1d9563171f7d2303df404bd69597e
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, to 'ttraff.com', is flagged as a malicious redirector. The document body, though partially garbled, contains the phrase 'Best chat platform on android' and a URL that matches the malicious redirector, suggesting a lure to a potentially malicious site. The presence of numerous Shopify-hosted PDF links indicates a coordinated effort to distribute content, likely for SEO manipulation or to host further malicious payloads.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=best+chat+platform+on+android
    • http://files.thevictoryhub.com/uploads/1/3/0/9/130969712/tuwodixinul.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/gopejotuzev.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/convert_entities_solidworks.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/gexudimilajuje.pdf
    • https://cdn.shopify.com/s/files/1/0463/9578/5371/files/bittorrent_utorrent_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/wirazobirib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1785/3335/files/52840471447.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/26561318021.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/77395269616.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/jubibidozidovux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.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_off000075ca.bin
6907b164c73ddd392405303fca7484a5529e865788518bc250f2c5973f2e8174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CA 5444 bytes
font_01_sfnt_off00008829.bin
dcc8dfbe04dd25d15b1db1c54ff4fcff4276e7213d401525e4045cfafbf77fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8829 10292 bytes

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