Malicious PDF — malware analysis report

Static analysis result for SHA-256 c244e91c4b614b0f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-05 21:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95cea5890e36f6558007835bc9a6682f SHA-1: 010cdffa27a3c77abe7d6340cdaa01eb5b4629cf SHA-256: c244e91c4b614b0fecd64083e9b3750b65a1b199e55cd5105259020dac3f7667
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. This suggests the primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link-farming or redirection-based attack pattern.

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.cc/wb?keyword=differentiated%20instruction%20template%20pdf
    • http://files.clareslaneycounselling.com/uploads/1/3/0/9/130969405/xakidebuda_pikilogi_lemojidefidax.pdf
    • http://files.greenmarkdairy.com/uploads/1/3/0/7/130738823/9ee50.pdf
    • http://files.tylerversluis.com/uploads/1/3/1/0/131071151/7896104.pdf
    • https://cdn.shopify.com/s/files/1/0430/9601/5002/files/romep.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/plex._comtv_link.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/90494540833.pdf
    • https://cdn.shopify.com/s/files/1/0428/8879/0179/files/55992723911.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/18067894282.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/bimemaxizakedet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/mr_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/sisapatotalirebi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/74088908400.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/49347312509.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagitigupi.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_off000082b8.bin
14c9c3474f75a379c61c568c210c8ce59d7163ee51267cf9948d5e72be3db27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B8 5300 bytes
font_01_sfnt_off000094b0.bin
9e9ace4bc8decd43f0dfdf26dba6675427c4bfe9fdedcc3310fda21e642b2e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B0 9888 bytes

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