Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcb78185fc8b1b3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 06:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f72648d1984e4d512971d7ec87ae6e4 SHA-1: 4f4b7dab90ffcec04812460948326024f5c54ef8 SHA-256: 2bcb78185fc8b1b399307d714c8cc9d77cedf5d00448d5825fdf49b9e198ed8a
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'solving equations worksheets grade 8' and the malicious URL. This suggests a social engineering lure to trick users into clicking the malicious link, likely leading to further malware download or exploitation.

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=solving+equations+worksheets+grade+8
    • http://lorefoxe.spiritueelwerker.nl/uploads/1/3/1/4/131437987/571834.pdf
    • http://gijufigot.artdame.com/uploads/1/3/0/7/130739046/4426244.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9230/files/18528201955.pdf
    • https://cdn.shopify.com/s/files/1/0429/9833/3599/files/interior_design_proposal_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/36741965957.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/escritores_de_la_libertad_libro_completo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/application_octet_stream_php.pdf
    • https://cdn.shopify.com/s/files/1/0440/8197/1365/files/80348970299.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/selezixebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/collins_scrabble_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/23723156628.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5023/files/32864315586.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/schistosomiasis_disease.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/vefet.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_off00005d10.bin
e978ee0ba2b88aaa995534e1f9981e4a99bee6d58121b5dc8e86f3752cb9751b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 5728 bytes
font_01_sfnt_off00007094.bin
820a00196c2306b4da97a44101a185d23b8fddb3f2b30c5c8ab9501847d47ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 12568 bytes

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