Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdd74545199ca73…

MALICIOUS

PDF

78.2 KB Created: 2020-07-28 06:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a41abcfc7a80d8aec6ac6c3eaf53bb0d SHA-1: d8d032d352d2b00c52978049acc47cec16baed5b SHA-256: 2bdd74545199ca7398a0b7eb10285c350d18540d1f9461212f1424c2689ab049
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, appears to be a lure for a 'study guide'. The combination of these factors suggests a social engineering attempt to redirect users to malicious content, potentially for malware delivery or credential harvesting.

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.com/pify?keyword=aapc+cpc+study+guide+free
    • http://files.juliaandjustjulia.co/uploads/1/3/0/8/130814605/xijimi_pofunajojixos.pdf
    • http://files.airdriekarate.net/uploads/1/3/1/1/131163643/4059614.pdf
    • http://files.nadiaremmerswaal.com/uploads/1/3/2/6/132683289/1320855.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/19038430182.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/muvivuturevipinomixabix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/sapelajuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/gonubukozusatalox.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/31493570440.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/vilisenolaxowuzovole.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/42716445117.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/41149805913.pdf
    • https://cdn.shopify.com/s/files/1/0430/9994/7169/files/datadekozamapedogipevawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/nazenogozewema.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/gixalijuxixezevugitigamet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/36160600932.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/bitibazo.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_off0000f54b.bin
388fdd093d90dfb59240a33cbbf01751480f047712c83348bdbe40a97d932052
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 5048 bytes
font_01_sfnt_off00010697.bin
6b876635a21ad3d837153a283768a371efa62481b541a4b5067ad3d9a09b926d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 10808 bytes