Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81cba30adadc4c5…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 16:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eff4a1cba0c2363fb4d96d4bd0684bfd SHA-1: fe656286cf2f3649d17647138f29c35787c96d3c SHA-256: b81cba30adadc4c5a62733a4ad8526d5238c3104b6e20120900b1226a3b9cb44
130 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, with one specific URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'ceo haryana voter list' and a URL that matches the malicious redirector, suggesting a lure to trick users into clicking the links. The presence of a 'download button' heuristic further supports the idea that the document is designed to prompt user interaction leading to potentially harmful 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.ru/pify?keyword=ceo+haryana+voter+list
    • http://files.brucesbreads.com/uploads/1/3/1/4/131407802/6986769.pdf
    • http://files.spectrumshowstables.com/uploads/1/3/1/4/131409794/d1b305.pdf
    • http://files.thenarrowpath.co.uk/uploads/1/3/1/4/131453649/kakupumoputexu.pdf
    • http://files.qatarmma.com/uploads/1/3/1/8/131871692/sibajetuf_jatafe.pdf
    • http://files.fear-less.co.nz/uploads/1/3/1/3/131381021/somukitejawi_nutenewelirob_pepatotupiveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/agri_tools.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/73292489778.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5710/files/10615799380.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/libro_finanzas_bursatiles.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/boiler_control_systems_engineering_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7470/5815/files/denerusabuxomilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/80985051411.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/silver_walter_de_la_mare.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/16195634943.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/93581541105.pdf
    • https://cdn.shopify.com/s/files/1/0428/7456/8860/files/15076107634.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/row_reduced_echelon_form.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_off000064c6.bin
17a806779be0202bdaf67fb681ce8d921ec79a0026747aa44b9ab098eb11c61b
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 4840 bytes
font_01_sfnt_off0000753c.bin
28a42b2a233651998085cdf8c2d8c81c456fcd69540c3ab991ddcdf7bab6c200
pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 10336 bytes