Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fda3a0bb84a192d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 02:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76affb2adb7799ec98099e5ab817e8c SHA-1: 6fa99d5066dc427531e199db9cd9287b9ba3f2f1 SHA-256: 3fda3a0bb84a192d169bd750b646ef96a4e43bc0b6f30b8d3138d84258ddac79
168 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=3d+sexvilla+2+torrent', which is a critical finding. It also features a large number of external PDF links, many hosted on static.usrfiles.com, suggesting a link farm for SEO poisoning or distribution. The presence of a 'password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass gateway security. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs.

Heuristics 5

  • 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
  • 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/wix?keyword=3d+sexvilla+2+torrent
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/dasujotirujikofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/pafulomagapejadileli.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/25314332865.pdf
    • https://static.usrfiles.com/ugd/b8c837_8aa41ffa18ba4e1197b953e9ff1370bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0efc339b98e747a992879437c9e52293.pdf
    • https://static.usrfiles.com/ugd/d5415a_c612c41c1de74fdca31fc0ff6115f1d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2e4ea4c537e4aed807f9165405a8193.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdc77f2aa0844d95be48d2cfbe874bbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_73a4b963136145b3a6926b0b26b4ce24.pdf
    • https://static.usrfiles.com/ugd/4ae4db_8623e1c2036c4361bc695afad2f997b0.pdf
    • https://static.usrfiles.com/ugd/822ecd_41b90aadc3e5411b95cc78354070c262.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4abdd563b084907801b7395f72b7dc4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3dd0371af56e42128cb15d9a4eb90424.pdf
    • https://static.usrfiles.com/ugd/067ecb_20bffffc28f64eb28cadf7a5df6eea15.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_off00006c55.bin
42e199c6ffd63d0ae386cf769c901dd5fd483ccd4867711e4f60cb350823db80
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C55 5148 bytes
font_01_sfnt_off00007de5.bin
9b4d831470911dadf6b865c04be7f69739ee0ee6aaf6ec772b32894c7ced8318
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 11528 bytes