Malicious PDF — malware analysis report

Static analysis result for SHA-256 565585b66e254ece…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 01:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3b3c87cca0ee6807a5fb043a31873b1 SHA-1: f2e3c36b63d915d65f460b476537cb62d28704e6 SHA-256: 565585b66e254ece4f82b29f5720032eda300e65ec57453802224e50312735cf
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=from+gene+to+protein+transcription+and+translation+answers
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/simplifying_radical_expressions_worksheet_kuta_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1265/files/customer_relations_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/longman_dictionary_of_common_errors_new_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/vuwefodarilatopojitosu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/93981938777.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbc1a33656694093b4b3582e9f56fbf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa69dcda05904dac861d848e4ad6c543.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb4c279411424fc8b36940eb16d3c4d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8c36b70ffb34682ad727a0ea84269f1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/ritufotavevilum.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/gedavebefuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1360/3491/files/jorirunagulimimuges.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/11880265589.pdf
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/the_prince_summary.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_off000057d3.bin
adc09f6eff0fcec6661a12e5e8ce31130bf806bdadd105e2e7feb1a145bd1496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D3 5440 bytes
font_01_sfnt_off00006a4e.bin
2c9b76d6f3f0eea72a7da8a672ef1ac1d4c966f383d8f2a15260a440670062da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 10184 bytes

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