Malicious PDF — malware analysis report

Static analysis result for SHA-256 504701fcb7223c4e…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 02:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bbe11e97713861658d47bcd143654af SHA-1: c41201c1801ebcb88d659385d4467c7e9e879e79 SHA-256: 504701fcb7223c4ebe899f11d845d9915f43cfeb436a17d6210a87eb550ca559
160 Risk Score

Malware Insights

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

The PDF contains a lure suggesting the user needs to install a browser extension or update to view content. It embeds numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=how+to+delete+all+likes+on+twitter'. The presence of a link farm and the redirector strongly indicate a social engineering attack aimed at driving traffic to malicious sites or potentially delivering further payloads.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=how+to+delete+all+likes+on+twitter
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.pdf
    • http://files.radtkebasstrail.com/uploads/1/3/1/4/131483019/d4b7d1b76a6ad8b.pdf
    • http://files.knowledgeenriched.com/uploads/1/3/1/1/131163533/buxuwiraj-pazinojib-rogowuvadog-vefemoxuroxez.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/56313366084.pdf
    • https://cdn.shopify.com/s/files/1/0437/9358/0189/files/71452126892.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/46767811554.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/niripisudavuvajoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/2001_bmw_x5_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/55526249998.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/zipanita.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/59070113662.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/93773095802.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/eu_to_rf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/91617579465.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/25958050779.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_off00005f37.bin
e1c06a31f8d156a39d923a5815fd4d6c7d4d8a89a96e64d095bd7d932e2b0492
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F37 4936 bytes
font_01_sfnt_off00007019.bin
ab654f04c93e50ceff2af9fd5861994187afa940ec7196898938c8ea2727bf4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7019 10468 bytes
font_02_sfnt_off00009414.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
pdf-font-stream PDF embedded font (sfnt) at offset 0x9414 16036 bytes