Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4416a431da55fd9…

MALICIOUS

PDF

58.8 KB Created: 2020-08-01 15:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d76bfb65e977a0099bd7d3563536bcf SHA-1: 0758a26e78cf71affdc50fd09631c06897ad6a27 SHA-256: c4416a431da55fd96a37b5db7c4673c8a6ed119ca6e3932d17dd0504ab8417c5
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a malicious redirector link that points to traff.cc, a known malicious domain. The document body, though heavily obfuscated, contains text related to 'intermediate accounting kieso 14th edition pdf' and appears to be a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host further malicious content. The primary attack vector involves tricking the user into clicking the malicious 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=intermediate+accounting+kieso+14th+edition+pdf
    • http://files.coplanvineyards.com/uploads/1/3/1/3/131398019/pejejexusudojo-xitefeluvepi.pdf
    • http://files.crawcainellc.com/uploads/1/3/0/7/130775953/pidudubalofawog_mavezarekegezu_vozagowalixakid_tosax.pdf
    • http://files.heightsfloraldesigns.com/uploads/1/3/0/7/130775391/wewawasadixiwagobur.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/27739459319.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/tetefis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8362/7686/files/17896541490.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/komugiwukikadisan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/64367063668.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/6235832938.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3990/files/jufenozadutopuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/80482903276.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/jalenisifadunedudawiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/jaxuzapujapumizixoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6141/files/dinemabifejedinasukon.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_off0000a633.bin
b3f15bcc9ccfd0386cbb1b77c2d0e28fc28746afc9dacb8f2c44e836da729d4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA633 5676 bytes
font_01_sfnt_off0000b96d.bin
6ae115ba263e991bb9e684655d182783cc084f3bfae7d271b23270ca7518be9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB96D 10848 bytes