Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5bcb1b8a8ffdab…

MALICIOUS

PDF

45.9 KB Created: 2020-08-02 04:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6d344906f84805f5a20196363f94551 SHA-1: 833b9e68e9ce03172de7fa4cb5258bb50c8ac80a SHA-256: 4c5bcb1b8a8ffdabea69714afe2a9c8ce21113d8ada67beb4fd649e14f80c596
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the payload. It also exhibits characteristics of a link farm, embedding numerous external links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The presence of a 'download' button lure further supports the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.cc/pify?keyword=corporate+finance+3rd+edition+pdf
    • http://files.inzei.tokyo/uploads/1/3/1/8/131856331/walulina_sexawotivega_mejediv_sulixumop.pdf
    • http://files.athletesrecycle.com/uploads/1/3/0/8/130873894/7662002.pdf
    • http://files.davesavage.com/uploads/1/3/2/6/132683289/nozijowivuke-depaza-guvewa.pdf
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdf
    • http://files.leonmccarron.com/uploads/1/3/0/7/130776006/20f37e61bcd34.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/kalutami.pdf
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/31436709130.pdf
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/wozepo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/vujewibafatejilemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/zerozobusemapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1080/files/79654558385.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/zatebomivose.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/pezusorila.pdf
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/borelemabikitatovixomit.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_off00007656.bin
a7bd63756f259d0a0cfd1831a3f3e59e71a00ffa12d52af02808f1591a850c72
pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 5008 bytes
font_01_sfnt_off00008770.bin
f856e739a790cacedc4a9f08570a668ba62bd6121759d849bbed39e01d6e9ec2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 10456 bytes