Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eab8d295a8d332a…

MALICIOUS

PDF

65.5 KB Created: 2020-08-18 17:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eab15f2bf4c2e93c5fa9f7501292f4f2 SHA-1: a37c0697d5a94417fd4a35c8c6024a436f28d93c SHA-256: 5eab8d295a8d332a4a62718bc2ba812c3689f8abbf6fc381041d0a6f0981fef9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/pify?keyword=ways+of+the+world+third+edition+pdf. Additionally, it exhibits characteristics of a PDF link farm, containing numerous external links. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise a malicious redirector as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=ways+of+the+world+third+edition+pdf
    • http://wuzosexop.revistaperiferia.org/uploads/1/3/0/7/130738730/gorakeraluk.pdf
    • http://latileb.carpetcleanoahu.com/uploads/1/3/1/6/131607575/2f1e94ddb.pdf
    • http://files.scope-for-growth.com/uploads/1/3/0/7/130775952/3e3c641.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6504/8229/files/bnf_bnfc_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/didoxetukubametevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/dipivezudufazomigowile.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/marathi_calendar_2020_october.pdf
    • https://cdn.shopify.com/s/files/1/0437/0877/6600/files/astm_a572_grade_50_standard.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/15683842455.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/88484427388.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/13877857257.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/peta_bulatan.pdf
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/drake_all_me_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/rabapuw.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_off0000c108.bin
ae826fce0e5aaf6f32ab51348fa1fef9540017fc4d47962797aac49212dc04a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC108 5336 bytes
font_01_sfnt_off0000d343.bin
541547cb6cf788ebf60d2c0daae541e2d70e48d9f0f1e50def0882e291365e27
pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 10608 bytes