Malicious PDF — malware analysis report

Static analysis result for SHA-256 372ef5fa40bfd71a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 13:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e7c9acc2c279872a4437edd47b16363 SHA-1: 6e3d60d24c4a50c694dfe766fff9dd177803ccbf SHA-256: 372ef5fa40bfd71a84600fd9ba41db04940dc17cf058879836a16d9336512b1a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=metabolismo+anaerobico+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to what appear to be SEO-optimized PDF files hosted on Shopify. This suggests a link farm or redirection attack designed to lead users to malicious content.

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/pify?keyword=metabolismo+anaerobico+pdf
    • http://files.rozenblatrealtygroup.com/uploads/1/3/0/8/130874097/9167842.pdf
    • http://files.cvubaseball.com/uploads/1/3/1/6/131606262/dakavo_somuxasab.pdf
    • http://files.benjamingilpin.com/uploads/1/3/1/4/131483955/4662606.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/gokerapujuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/tetiludetekijab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/pejugowusirupirowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/83907793839.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/banking_and_financial_awareness_for_sbi_clerk_mains.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/56644432253.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/fugoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/20477242856.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/80675398433.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/tarodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/tenupeketefazimonizaveden.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/ap_ssc_exam_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/xesipetozifodugepikawemip.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_off000069ed.bin
fc82938f826b28ae38e9075cee75902c8fe815b8dd35fff32376cde1d4e17c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69ED 5448 bytes
font_01_sfnt_off00007c62.bin
1ce7f842eada5f2f57c19d3957284625c81d88a7fe56d9f830b682d8795188e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C62 10140 bytes

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