Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f4f7f10e89f566…

MALICIOUS

PDF

52.1 KB Created: 2020-07-20 05:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 630f8c195f2d5e927ec816415df6dda0 SHA-1: c84cf51e44e4d2ca8be96feb18cc3112dac96d28 SHA-256: 54f4f7f10e89f566923014421cf7e2b80d21ac7c8e56235bc151e99fd5d0f395
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'Bestek power converter manual', likely serving as a lure to encourage users to click the malicious link.

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/wb?keyword=bestek%20power%20converter%20manual
    • http://files.dohotyoga.com/uploads/1/3/1/4/131406391/gitonanuteke.pdf
    • http://files.katarinatuffvesonjensen.com/uploads/1/3/2/7/132712369/1511650.pdf
    • http://files.primepropertiescebu.com/uploads/1/3/0/7/130738875/zovirujufufeso.pdf
    • http://files.switchbacktaco.com/uploads/1/3/2/7/132710491/tefivufuvudewavaved.pdf
    • https://nosuvul.files.wordpress.com/2020/07/6018047824.pdf
    • https://dabefime.files.wordpress.com/2020/07/rabufelekivoremab.pdf
    • https://muxizesuja.files.wordpress.com/2020/07/39809622684.pdf
    • https://letevotiva.files.wordpress.com/2020/06/9587380938.pdf
    • https://lavuxelo.files.wordpress.com/2020/07/topexa.pdf
    • https://mefarogaxubo.files.wordpress.com/2020/07/8790894834.pdf
    • https://jepanabukam.files.wordpress.com/2020/06/bujukemek.pdf
    • https://jadozex.files.wordpress.com/2020/07/lekezazetima.pdf
    • https://metexufo.files.wordpress.com/2020/07/dogafulisager.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/9479579058.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/roxopipowapofunun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/wugikirinovakobesazenuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/wowidilug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/37152095520.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/46945581845.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/25323643537.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_off00008a01.bin
03fd40ea801bc51fc60226fec457fe157327796d1d478e35fd3f9c225d0aa65e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A01 5180 bytes
font_01_sfnt_off00009ba3.bin
e664dae76caa1e5bc92f7e8682c922e267efa98026d641fd92b03696c506b097
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA3 11040 bytes