Malicious PDF — malware analysis report

Static analysis result for SHA-256 824d18b0d620f702…

MALICIOUS

PDF

36.9 KB Created: 2020-08-31 01:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff5c6dc6ba66d2bd9946c51bbc01044a SHA-1: a01934f061fd1fcdf478953721372236dca9dbce SHA-256: 824d18b0d620f7021e5626271cf85a18d3becc655cb36064a5834cef1b45cd3e
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'genetic mutations worksheet answer key' and the malicious URL. The presence of numerous PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious redirector.

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/wix?keyword=genetic+mutations+worksheet+answer+key
    • https://cdn.shopify.com/s/files/1/0437/4613/2119/files/fivosuwusogaxugadogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/alquiler_de_ahoyadores_manuales.pdf
    • https://cdn.shopify.com/s/files/1/0449/1155/8811/files/alagiya_cinderella_song.pdf
    • https://cdn.shopify.com/s/files/1/0462/4384/0160/files/dividing_decimals_mathworksheets4kids.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/dance_performance_program_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/10612032148.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/kezip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/viviguzigidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9648/files/85991836077.pdf
    • https://cdn.shopify.com/s/files/1/0438/0537/6669/files/bruynzeel_storage_systems_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/libros_de_mijail_bakunin.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/57150474051.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/serway_physics.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_off000045d0.bin
54286eaeb2f52e78e51418309a5c3760881835e2f3b2d28ffcf1e416059b16e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D0 5180 bytes
font_01_sfnt_off00005758.bin
da8662650b8369dd05975eb54275e9208aeab4766422565d4dae4d035945aca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5758 9804 bytes
font_02_sfnt_off000078ea.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EA 4324 bytes

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