Malicious PDF — malware analysis report

Static analysis result for SHA-256 6164030bf7b960fa…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 06:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9630e21a8f318796c03890fb04105c29 SHA-1: f37abfd650dc6a997a948f8b7c61e407de2a3665 SHA-256: 6164030bf7b960fa2009fffa9a4c77e3dc9004ab3c17e66e4bc3977a8366e86a
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or redirection scheme designed to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=actitudes+de+un+lider+pdf
    • http://files.ericassimmons.com/uploads/1/3/0/7/130739504/sedejametinedo-nimog-vovigogelukaluj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/0797/1226/files/lawudikujowedogemeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/mazupuxotabi.pdf
    • https://cdn.shopify.com/s/files/1/0445/7719/4148/files/bafabij.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/82934621520.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/6542468105.pdf
    • https://cdn.shopify.com/s/files/1/0452/6351/9906/files/free_auto_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/jopatuweveweburux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/sabadiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/7959/6187/files/periodic_table_of_elements_with_atomic_mass_and_valency.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/9114778041.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_off00005fe7.bin
ba697ce5bfbdf9ef357e43195448beee8c14c0b29ebd44261b4e715a36c092fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE7 4928 bytes
font_01_sfnt_off000070b2.bin
feb2c343393b6c0629b006d1b31e359c37532875ab93ecd56d4abd0003e03161
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B2 11780 bytes