Malicious PDF — malware analysis report

Static analysis result for SHA-256 962564bd48fb7bac…

MALICIOUS

PDF

42.7 KB Created: 2020-08-10 12:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fb1dfab0fa527afb7be674ad58f625c SHA-1: 905f056b7d489c6020f68a65a335aff4c66ec934 SHA-256: 962564bd48fb7bac2669934001c5254a13ea1ab6284a7ca5e22d4b37238a7e13
128 Risk Score

Malware Insights

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

The PDF file contains a deceptive call-to-action button and embeds multiple links, including one pointing to a known malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=free+calligraphy+worksheets+printable+pdf, is designed to lure users with the promise of free worksheets, but ultimately redirects to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm intended for SEO manipulation or to obscure the final malicious destination.

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.com/pify?keyword=free+calligraphy+worksheets+printable+pdf
    • http://files.mcmillansj.com/uploads/1/3/2/7/132712355/1580116.pdf
    • http://files.jwhumbertinc.com/uploads/1/3/2/6/132695569/mepupukelowuna-pedipopez-fitiwusaz.pdf
    • http://files.startxbenefits.com/uploads/1/3/2/6/132683328/9979d7e4740838.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/buwinoxitalewujufelex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/newark_weather_radar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/12291594160.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/rokizizenuvijuxekejadawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0914/7043/files/24757831496.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/wazasajipepaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/tenejokosulajabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/misewusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/72239210468.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/86197148184.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_off00006677.bin
8b8688df71f5b116186b179713f685ab6b8c9624556169ba6a68090a1cf1bc9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5772 bytes
font_01_sfnt_off00007a28.bin
bf3dbeab143d8a7e068e41a7c18ae238c4523ff284e28134cab0171ceb9425fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 10404 bytes