Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef5274bb0ceeffd…

MALICIOUS

PDF

54.6 KB Created: 2020-09-01 01:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 865d9a13511dc918e9b96d4d12cb05cf SHA-1: 9145e9bd9e6506ec26ea4f9d2078ccd37ff17de3 SHA-256: 5ef5274bb0ceeffda8eb7cc5984bbbe7183e8d0e63fcc247037e3d458be839c4
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an advance-fee scam lure, presenting itself as an 'intermediate english story book pdf'. It embeds a link to 'ttraff.com', which is flagged as a malicious redirector. The document also contains a large number of links to Shopify-hosted PDFs, likely for SEO manipulation to improve the ranking of the malicious link. No scripts were extracted, but the presence of embedded URLs and the scam lure strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=intermediate+english+story+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/zoology_practical_book_for_bsc_2nd_year.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/70168300970.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6341/files/na2so4_lewis_structure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/the_ultimate_rpg_character_backstory_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/causal_definition.pdf
    • https://static.usrfiles.com/ugd/08fe48_bd3446fb777147e8bbd22676ec7137a8.pdf
    • https://static.usrfiles.com/ugd/ae15ca_ee43a4d0c227472fa4a50b21678e369f.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/brahma_vaivarta_purana_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/18842246410.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7800/files/managers_and_the_legal_environment_p.pdf
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/quickbooks_payroll_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/toziwogodij.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_off00009821.bin
e40226beb761146bc34333d51613576f8f861c30c46b828d4dfbbd82f9800df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9821 5696 bytes
font_01_sfnt_off0000ab5a.bin
140eebd26a8eb7e4811b19ceb02ae4ea9346bf6635563385688e2d4e47fbe7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5A 10212 bytes

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