Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c175b8d643a8cca…

MALICIOUS

PDF

42.5 KB Created: 2020-08-25 04:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efd69a2d49c8b522738c99d33a356896 SHA-1: d93814430b850bbb4acd87f3c287af1227162dcc SHA-256: 6c175b8d643a8cca23779b95e17ba073d5a2e9d836aea370c4af289a286492bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including a primary malicious redirector at 'https://ttraff.com/pify?keyword=rl+craft+leveling+guide', disguised as a leveling guide. The document body and embedded links suggest a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=rl+craft+leveling+guide
    • http://files.carpentercprsolutions.com/uploads/1/3/2/7/132740285/af4dab19.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/suffixes_able_and_ible_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/order_confirmation_template_bootstrap.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/i_care_beyonce.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/neoliberalismo_histria_e_implicaes_david_harvey.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/23413909752.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/lightroom_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/5190231589.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068dc.bin
d10ed55ac99d71da427a3c15c728e61fd6081e5edb7ce10612be9a7722547c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DC 5080 bytes
font_01_sfnt_off00007a3a.bin
940a65773d3ce0ccdedccc86010e7bc383a92910b140732c55a113738934f5f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3A 10536 bytes

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