Malicious PDF — malware analysis report

Static analysis result for SHA-256 2333d89a4a6b0b90…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 05:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9006310726fdd69ad2f975faf3f493ea SHA-1: c82a410086151be5f802a358f57b38c4b63937d1 SHA-256: 2333d89a4a6b0b903e068016eb7e8ff990b89fd24717d52f5d930771b2b1ecd1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=cuales+son+los+fenomenos+macroeconomicos+y+sus+variables+de+interes'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file is likely intended to trick users into visiting the malicious URL, potentially leading to further malware delivery or phishing.

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.cc/wix?keyword=cuales+son+los+fenomenos+macroeconomicos+y+sus+variables+de+interes
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/zakowazuvuvum.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6503/files/argumentative_writing_format_igcse.pdf
    • https://cdn.shopify.com/s/files/1/0465/1158/7478/files/the_avengers_2012_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0435/6613/7507/files/nolide.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/birav.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dcae3f53e624f2aa444ceba4c10c12f.pdf
    • https://static.usrfiles.com/ugd/96768c_22571fe21d5d499fb557f2cd71d62abf.pdf
    • https://static.usrfiles.com/ugd/b8c837_75f2379b2b204ca4b35a4f382879b9ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_6077fea1ecaa4c87afd75ccf61108b86.pdf
    • https://static.usrfiles.com/ugd/b8c837_adcbfd0dd84c46919f0b95b7516ae856.pdf
    • https://static.usrfiles.com/ugd/b8c837_a38d6fa4cb47484080ed3b800154c22e.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_off00006232.bin
9fa40fbe6c4d03d9f37cc6c7556219cc00a85c3424e17a890bba49f28bbd8678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 5376 bytes
font_01_sfnt_off0000746f.bin
e07eff3255199805ba06af315756a50aa222562475cecae3575500e01cdad350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746F 11388 bytes

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