Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7ddc6885fa9ae4…

MALICIOUS

PDF

35.1 KB Created: 2020-07-08 19:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97acfea24ed99fd5249b95209db02fec SHA-1: abb0abc08eaca45f203e3ffd3c4160944d879dba SHA-256: 4f7ddc6885fa9ae4c16660854074ff0e6dbe7700940526dd6afcebd97db83c74
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The primary link, disguised as a Yamaha PSR 175 instruction manual, redirects to a malicious URL (ttraff.com). This indicates a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wb?keyword=yamaha%20psr%20175%20instruction%20manual
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.pdf
    • http://files.cbuhrlaw.com/uploads/1/3/2/6/132695574/vawoguneriz.pdf
    • http://files.pvpresby.com/uploads/1/3/1/4/131407823/gujevizasemul.pdf
    • http://files.ueamun.org/uploads/1/3/1/3/131398250/vifomog.pdf
    • http://files.rubylakeresort.com/uploads/1/3/1/6/131606144/dolubutil-tadimo-wiruwefadinik-xavuwozubu.pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://files.juliakitokirtley.com/uploads/1/3/1/1/131163957/satorenemap-zezutulemu-xunodunor-fixibakalabum.pdf
    • http://files.countyparkfriends.org/uploads/1/3/0/8/130814279/zobisulit_selitiga_sojinotavom.pdf
    • https://sediniguto.files.wordpress.com/2020/06/tulibovexirofopug.pdf
    • https://niboviris.files.wordpress.com/2020/07/22106568078.pdf
    • https://duwopizemole.files.wordpress.com/2020/06/3168179563.pdf
    • https://risifijog.files.wordpress.com/2020/06/48167371371.pdf
    • https://migosefej.files.wordpress.com/2020/07/44865321950.pdf
    • https://pigejonuzona.files.wordpress.com/2020/07/58712248910.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.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_off00004b30.bin
32c7179f0a3bf8f60086325adce98c289d38469b8a4cd449b4d37f9f3f3c7e5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B30 5152 bytes
font_01_sfnt_off00005c8b.bin
90210946c3a619e2e94bdc0691f5e16251aa1edba542882426aba90787e5cbf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8B 10252 bytes