Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17f5c5e2ad4c262…

MALICIOUS

PDF

35.1 KB Created: 2020-09-02 08:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a08f9df159e8796ce4732f6c21fb6c SHA-1: 62ece669f076b73c16a80fcac0dd5f95e6e8e547 SHA-256: d17f5c5e2ad4c262bf2e364cd0d6f83a12fe679e87777350f0c6279f083bf28a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a prominent link disguised as a download for 'cooking academy 2 full version'. This link, https://ttraff.me/wix?keyword=cooking+academy+2++full+version, redirects to known malicious infrastructure. The document also contains a large number of embedded links, many pointing to static.usrfiles.com, suggesting a link farm or redirection strategy. The presence of a 'Password-protected archive handoff' heuristic indicates that this PDF is likely intended to trick the user into downloading an encrypted archive, which would require a password provided separately, to bypass gateway scanning.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.me/wix?keyword=cooking+academy+2++full+version
    • https://static.usrfiles.com/ugd/d2751c_e54c4080edab4e0790201d9354a0b4ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_71579a2e973a4942a47c4e245a47f217.pdf
    • https://static.usrfiles.com/ugd/822ecd_fc3cb230ba65458a9c3c22190469b1c8.pdf
    • https://static.usrfiles.com/ugd/362633_254e65b5f7284c08aa088e1a4eb3a178.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6c96c2d281974108ab08ff5b1ae8ddd4.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/59867112383.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/terosozopov.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/densha_de_go_64.pdf
    • https://cdn.shopify.com/s/files/1/0435/3032/2084/files/bonogejinaliguzegere.pdf
    • https://static.usrfiles.com/ugd/a31856_0d3d3aec1f414841b1a957c7064b00e3.pdf
    • https://static.usrfiles.com/ugd/e4ee87_05fdc57ec5af4c6f989a776ddfb3262d.pdf
    • https://static.usrfiles.com/ugd/b28ae2_b69fdbb0fe1746e7a3ab05880eb641fb.pdf
    • https://static.usrfiles.com/ugd/b5472a_d40c7c2d9ae847d2a23fd2e24bd3a9c8.pdf
    • https://static.usrfiles.com/ugd/21e6f2_949f764505eb455d942555162e29b5ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ecd29a50d8c4831847747d0c6715636.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_off00004ab8.bin
1eabca8c9f06bfef4ecedbdfabde7d09fb72c52c0bcce807b1bd8eb88fad7d55
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB8 5604 bytes
font_01_sfnt_off00005dcc.bin
5b3340a155a30be1e511188fedc82127aced9953d579970ef87b936ac3ee22da
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC 9896 bytes