Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ce3f30fbe0653b…

MALICIOUS

PDF

44.9 KB Created: 2020-07-29 19:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 793741b3011770fe136a2967565ac6f2 SHA-1: f2cfef333aee65ee83275985fafe2add3925d29d SHA-256: d8ce3f30fbe0653b3383909062fd5f6a9aa4a1cc6769672966c88a66afbc43d8
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to educational materials. The presence of a link farm further supports the malicious intent of distributing traffic to potentially harmful destinations.

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=biology+student+textbook+grade+10+pdf
    • http://files.othellogrowsupplyllc.com/uploads/1/3/1/6/131636914/vugaguwareleno.pdf
    • http://files.headquartersco.com/uploads/1/3/2/6/132695200/gukokonodidovopefoz.pdf
    • http://files.snugnut.com/uploads/1/3/1/0/131069781/94680ccfabf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/lofosofelujotufizopato.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/sidudiwunaduwerovufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/82176049146.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/92818930518.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/19181063181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/65523067959.pdf
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/godegoluxibadoxeluzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/femip.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/
    • https://cdn.shopify.com/s/files/1/0434/2457/9

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d45.bin
8459090ea9cb4b0c4482950c78a059b4db13659e67df55ab20381f4f54096d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D45 5708 bytes
font_01_sfnt_off000080c8.bin
e66c381555ada073328242ed17008542144ba799c34737521a59a60b794606d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C8 10608 bytes

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