Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e8f1608679a7ac…

MALICIOUS

PDF

48.4 KB Created: 2020-08-18 14:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef6b6bb07d1451f771e97dc309bf1c16 SHA-1: 0a23e578de07d45175c0bbd9b05ddec758096d6e SHA-256: a8e8f1608679a7ace8bedbb7ac63086e98fcfdd298b055e415e291416640a91e
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering lure. The document body, though heavily obfuscated, contains text referencing 'slicethepie review template' and includes the malicious URL. The heuristic 'SE_BROWSER_INSTALL_LURE' further suggests the document's intent is to trick the user into performing an action, likely clicking the malicious link to download further content or install a malicious browser extension.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=slicethepie+review+template
    • http://sebif.homerbiology.com/uploads/1/3/0/9/130969862/3559481.pdf
    • http://jotuv.jbfriends.ca/uploads/1/3/0/7/130739140/3426200.pdf
    • http://xajiri.newyorker.beer/uploads/1/3/1/6/131606598/84eff93935.pdf
    • http://files.bethelbaptistsumter.org/uploads/1/3/0/9/130969364/pefag.pdf
    • http://files.videofusion.co.nz/uploads/1/3/1/6/131637037/taxusaxixasu-tujisaralexonav-fepowinevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/stupore_e_tremori_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1733/0075/files/blessed_be_your_name_g.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/base_html_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/3543/2859/files/68702965702.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/libro_de_microbiologia_medica.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/tigoxuriguxuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/adding_and_subtracting_algebraic_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/34498407778.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/99731827289.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6088/files/fovuwigadewereki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/fabamemojagepuzob.pdf
    • https://cdn.shopify.com/s/files/1/0436/9160/6170/files/italiano_humble_texas.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_off000073b1.bin
a966e8d50a8bb6116b1a7233467122d2f0c098f2cef1a25a1a87e35d3eb94347		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B1 4820 bytes
font_01_sfnt_off00008414.bin
64ca76d629ea83bd654b7693b2584fb4c8249f8e70761d09964923b685c74114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 10092 bytes
font_02_sfnt_off0000a6b9.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B9 4324 bytes

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