Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b6b6e6e9e1c97a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-01 15:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fff43be809168f9314be16953320dac4 SHA-1: a161a43e499f5b3f562b3765f395b5bd0dfd89db SHA-256: 27b6b6e6e9e1c97a3dc8a32995312d435f29a3a4f250f193716dc5daf6acc918
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=scarlet+letter+study+guides'. The document body, though heavily obfuscated, contains text fragments suggesting it is disguised as study guides, aligning with a lure for phishing or malware distribution. The presence of a link farm heuristic further supports the malicious intent of distributing content via numerous external links.

Heuristics 3

  • 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.
  • 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=scarlet+letter+study+guides
    • http://files.servecom.co.uk/uploads/1/3/0/8/130813095/nubanatos-xekodalixa-wisozefoxikubaz-datut.pdf
    • http://files.ukirkaustin.org/uploads/1/3/2/8/132815365/784cfeb13e57a.pdf
    • http://files.moombaparkps.vic.edu.au/uploads/1/3/1/3/131383514/4040691.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/litemulipiterizesenujij.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/18974990516.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/najagewokubuwigav.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/30587689945.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/39495095820.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/javascript_array_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/8769604536.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/suvokoladasosutemekuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/lusexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/zaruvogefugumeket.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_off00007611.bin
fd3b44d192f966d650652bf435815435322b526e2224689e6b53585e88fd7b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7611 5312 bytes
font_01_sfnt_off00008836.bin
25f7377469b8e0bc4ea545f59090d562453ba7f507a463538e12078f094b2dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8836 10164 bytes

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