Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4dfad97e3f8c84…

MALICIOUS

PDF

38.9 KB Created: 2020-08-06 22:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 664c7e04ad8f8adeb13226612c1c97dd SHA-1: ebcc5d74d89c0efe4e1423e8deb8a65deec7fe31 SHA-256: 8b4dfad97e3f8c84d1bd24dbc87c3054c51eb7e3aadb5a1fbf76833ea8f609f8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources disguised as textbook downloads. The primary URL, 'https://ttraff.cc/pify?keyword=download+idodo+umeh+college+biology+textbook+pdf', is identified as a malicious redirector, indicating an attempt to lead the user to harmful content. The presence of a link farm further supports the malicious intent by attempting to obscure the true destination and potentially leverage SEO tactics for distribution.

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/pify?keyword=download+idodo+umeh+college+biology+textbook+pdf
    • http://files.spotlitekustomaccessories.com/uploads/1/3/1/4/131438150/rabozidusag.pdf
    • http://files.michaelenglandart.com/uploads/1/3/0/8/130814297/8215447.pdf
    • http://files.bowenheritage.org/uploads/1/3/0/7/130739308/1934782.pdf
    • http://files.riverqueengreens.com/uploads/1/3/0/7/130775320/wakumasawewasol.pdf
    • http://fifef.gtgsplash.com/uploads/1/3/0/7/130775823/dazimamudideni_xapisifafuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/nevumurewoganolexeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/jafub.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/clicker_heros_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/kadogagalatofejuxotebum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/28480719847.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/41041167021.pdf
    • https://cdn.shopify.com/s/files/1/0439/1193/8216/files/18445392979.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/9367236934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/15327425248.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/kuguxolal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4540/files/93970459645.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/folezovadelige.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_off00005658.bin
5385b2ab126e9cb1c07b34e96a027b2c6b0c007fefbf6abfe3773ca1efb08fe0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5658 5760 bytes
font_01_sfnt_off000069f9.bin
6d936d1f1d7d817769daa8373f43261a34008df731ae0049d4c900499258325a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 10068 bytes