Malicious PDF — malware analysis report

Static analysis result for SHA-256 6960ed22cb70e0fd…

MALICIOUS

PDF

49.6 KB Created: 2020-08-31 07:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ee288a8ae0607764a5abf03577b4f7 SHA-1: 9b7b24dde10784dcf727d46b4928dc7b7c04621e SHA-256: 6960ed22cb70e0fda0d0656b740d56f6fae821db710aecd457465533a26aa7de
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL. This suggests the primary purpose is to lure the user to a malicious site, likely for phishing or to download further malware. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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/wix?keyword=sch%25C3%25A9ma+de+la+meiose
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/23501655847.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/nonozonopas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/application_of_composite_materials_in_aircraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/pijelezedoxepovag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/ender_pearl_mod_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/mucho_ruido_y_pocas_nueces_william_shakespeare.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3570/files/dosarewotutomif.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/auto_service_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/92791241196.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/diravivajonogasibotiludut.pdf
    • https://static.usrfiles.com/ugd/08fe48_8c08351383744809848f165c159215fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1650010c74a4b21bfcd43e6d698b70b.pdf
    • https://static.usrfiles.com/ugd/a2e20a_c1ed76dad755440db99db255c2abca3d.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_off00008095.bin
3160f118f05778bdbfa594c26f03ede4ee40a99707f9b0659d9ad24ca92c0e22
pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 5328 bytes
font_01_sfnt_off00009245.bin
fc4d84bab28fe752d1c52dbed93017e95cbc1f077ac5a2ae03ca302b372481aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x9245 12220 bytes