Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4f46d881dd7b93…

MALICIOUS

PDF

42.7 KB Created: 2020-07-25 17:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4465073489f34cc0a43d581f8c6f9b9e SHA-1: 900727161c57e4e875c064afedfd1f07e75081b8 SHA-256: be4f46d881dd7b93475ce948df8f2bf7c9e4b42e6d0a78b10f21fa4938697cf4
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Blackberry 10' and 'android apps', suggesting a lure. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a malicious workflow involving user interaction with links.

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.
  • 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/pify?keyword=blackberry+10.+3+android+apps
    • http://files.writing-raven.com/uploads/1/3/1/8/131857199/9017008.pdf
    • http://files.seanstrees.com/uploads/1/3/0/7/130738568/kiwebapofegejo_zegikegidavo_nugawudiwalol_movasoni.pdf
    • http://files.lanaivanovpianostudio.com/uploads/1/3/2/3/132302928/7b83f688ea3a.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/31392774495.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/nirorixofujenitenefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/46994599211.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/98470071998.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/funanugifap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5069/5830/files/44950161380.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/2628480200.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/bewaxuletaxedipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/fejik.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/furapojovidipufutixomi.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/
    • https://cdn.shopify.com/s/files/1/043

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000684f.bin
18f6d3debf91f7c84682701b558142cd43a15cc7333034408fe97f8a2104d84d
pdf-font-stream PDF embedded font (sfnt) at offset 0x684F 5520 bytes
font_01_sfnt_off00007b14.bin
e4d85212a60cbe89182f04db68a1d00adbb0cb6ddd62f3d51007e39d9ac652c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B14 10260 bytes