Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9459746abba4bfa…

MALICIOUS

PDF

53.2 KB Created: 2020-08-27 22:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a90c1b490ad08f8b29f5b6b7bbf5b58 SHA-1: 55559e23d066361463fc3e3c766a51ae72ec3dc5 SHA-256: d9459746abba4bfab7d5d7b429360b2fd9f853df37f651f14d4ccc6cf3f77a44
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=yakuza+zero+walkthrough'. This URL is presented within the document body, disguised as a game walkthrough, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, likely to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be directing the user to malicious infrastructure via a deceptive link.

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=yakuza+zero+walkthrough
    • http://files.nostalgeekretrogames.ca/uploads/1/3/2/8/132816091/4b2685de5131.pdf
    • http://zudepe.downsyndromejunction.com/uploads/1/3/1/4/131437423/tokudidubozolirita.pdf
    • http://files.careholisticcenter.com/uploads/1/3/2/6/132695942/wiselebedasemivowazo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/dapowegofitixiporazol.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/spoken_english_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/gukomajexukatesuxuvoxikin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/7228584567.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/sowasameda.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/wogigaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/78037513355.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/rogosinazukumipo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/biochemistry_stoker.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/safawuwebunuvodulag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/ti_nspire_cx_cas_student_software.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d85.bin
bea3bfd9a03cf3c34323c60d0ac37f9f1205ec2343a5c4aaeab4a7b35725ce18
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 4936 bytes
font_01_sfnt_off00008e6d.bin
523001fd647c608860380cbdca5f53afaceab990e793008246778e506f3c0164
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6D 10052 bytes
font_02_sfnt_off0000b115.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
pdf-font-stream PDF embedded font (sfnt) at offset 0xB115 16092 bytes