Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4289959e42127d…

MALICIOUS

PDF

139.0 KB Created: 2020-09-15 10:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29c97258d570a5762644a53c049f8acd SHA-1: 74c1b9564595e96669ab0aea1d55e0737fce0ad8 SHA-256: 3d4289959e42127dff22e9c9ca8a5e96d32fa419e9dc2f80aa746e4711986064
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded links, one of which, https://ttraff.cc/wb?keyword=etapas%20de%20la%20revolucion%20mexicana, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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.cc/wb?keyword=etapas%20de%20la%20revolucion%20mexicana
    • http://boraxumid.launch-center.com/uploads/1/3/1/3/131383761/rewinugep-notisabibidiwaj-tagosovipikaze-punuvaganirut.pdf
    • https://static.usrfiles.com/ugd/d162e3_0ea9bc5127a441ab926027d6cffb14dd.pdf
    • https://static.usrfiles.com/ugd/0a593f_31075b0ef3b741c59b18583a90839b65.pdf
    • https://static.usrfiles.com/ugd/384ea4_68cffa54984b4ecfb8124d3d49122bec.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/93368242476.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/registration_form_template_w3layout.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/fable_3_pc_save_editor.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9551/files/arduino_simulator_windows_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/pezikixelixozi.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_72e81150f8584c4794cab512c9e1ff3d.pdf
    • https://static.usrfiles.com/ugd/957c7b_ed96e14dd0234d7da19678772b6dd491.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d7c8.bin
9d6803b915313d0bf38195ebda7bf661f703eb8fb86fa4bbcad06eabf7a23e1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7C8 5184 bytes
font_01_sfnt_off0001e951.bin
3471685860f7b1c043623e7bf7f5efc4def9f96ce14e4b2c54c2fe7fe3030266
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E951 11616 bytes
font_02_sfnt_off00020f40.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x20F40 4324 bytes