Malicious PDF — malware analysis report

Static analysis result for SHA-256 a437abe91b9633bf…

MALICIOUS

PDF

50.0 KB Created: 2020-08-04 17:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d23cfff95555f357c026ecba48b84c9 SHA-1: cc5effb870762677712c7674f613b79aaa7e742e SHA-256: a437abe91b9633bfb8fd26c9e741d36b696d5f552c007a233f19b33623b1bdb7
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic indicates a malicious redirector link to ttraff.com, which is likely used to funnel users to malicious sites. The document body contains garbled text but includes the target URL, suggesting a lure related to 'appsc group 2 previous papers'. No scripts were extracted, but the PDF structure and link farm indicate a delivery mechanism for potentially malicious content.

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.com/pify?keyword=appsc+group+2+previous+papers+with+answers+in+telugu+pdf
    • http://files.genevasurgicalsuites.com/uploads/1/3/1/4/131454098/31c98.pdf
    • http://files.cdprogram.net/uploads/1/3/1/8/131856519/derumewupudekaxojigu.pdf
    • http://files.flipconsultants.com/uploads/1/3/1/6/131636988/9bae14aee0b5cc1.pdf
    • http://files.alexander-arch.com/uploads/1/3/1/4/131437457/1741205.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/71136860840.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/arthur_miller_a_view_from_the_bridge.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/71850035399.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/86392449221.pdf
    • https://cdn.shopify.com/s/files/1/0440/8311/8232/files/22071675307.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/85609794849.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/bowaziruzunomafof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/18780959651.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/nesibifepotukegobokemub.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/65111135342.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/17912878701.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/tabajidejolitobuvazogos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/arch_linux_pulseaudio.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_off0000652e.bin
72de0c9d7c189a25ff67cbe42d431e3ab00d58677bac44a2d18571348deda8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 5688 bytes
font_01_sfnt_off0000789b.bin
46bc6808ea2858f24d09482a7e4f131beca126f43e5d41493aef9009d1c8ff19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 12040 bytes
font_02_sfnt_off0000977b.bin
d1ad8dc0b55c1c3f449b1e3640432eef20e8b3306e6fa483e2a749b9250f32a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 10180 bytes

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