Malicious PDF — malware analysis report

Static analysis result for SHA-256 a114e30b44203aff…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 23:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f71f96b4e92dc7ff0a2fd04883636a SHA-1: 40f9c9a26b067836ec15151f73f7002566eae336 SHA-256: a114e30b44203aff8fe0cf4a337873a93ab8d41eaff6825aa6e196fa726688d4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=sofia+the+first+and+the+secret+of+av', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Sofia the First' and the malicious redirector URL, suggesting a lure to trick users into visiting malicious sites. The heuristic firings strongly indicate a malicious redirector and a link farm, supporting the attack pattern.

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.ru/pify?keyword=sofia+the+first+and+the+secret+of+av
    • http://vovigog.riverglennkennels.com/uploads/1/3/1/4/131454215/nixezexirazezib.pdf
    • http://vekowula.nutrismartworld.com/uploads/1/3/1/4/131406082/zujavakox-xelukotunuro-kubetamoz.pdf
    • http://files.babasvegancafe.com/uploads/1/3/0/8/130874658/wiwub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/womokiwuzagatesenafan.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/present_continuous_tense_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/2269/4046/files/combined_gas_law_equation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0454/2342/7752/files/xexuwejijedililagilavil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/pimozegonesefeturukaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3297/files/background_check_army_form_number.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wiwatubaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7463/files/rearranging_equations_worksheet_gcse_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0465/0575/4776/files/horse_trot_animation.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/45983301444.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/59618085363.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_off00006df9.bin
d4def16e781c20ceecc8829622ce4c00c0862ea754f5bd5e938c6e358f8eb149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 5240 bytes
font_01_sfnt_off00007fbd.bin
d8e72ca92fa466a8e3e50f3e0b2d716b0710dd752be609bc86bb4777cfcb6d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBD 9980 bytes

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