Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e6f047af780f7d…

MALICIOUS

PDF

51.0 KB Created: 2020-09-03 00:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f91fedfa30be85fc47659adde0ffe1bd SHA-1: 46580be37d1a1e1c6be84aaf1970af7ffc695132 SHA-256: 36e6f047af780f7d12a3ca2984d846e40222bdea660cc4589c6f3ea2229c2b05
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'high school graduation announcements templates' and the malicious URL. This suggests a social engineering lure to direct the user to potentially harmful content. The presence of multiple external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.ru/wix?keyword=high+school+graduation+announcements+templates
    • https://static.usrfiles.com/ugd/f241d9_b2b383d0d2834dbcb4d39e6225249ec4.pdf
    • https://static.usrfiles.com/ugd/ade4e6_6a15a37e39a44123bf20d8403a5b8a45.pdf
    • https://static.usrfiles.com/ugd/4b68be_6144f07ebba8450585e1ba5c36fe03c9.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/39270579408.pdf
    • https://cdn.shopify.com/s/files/1/0439/9353/0526/files/area_of_2d_shapes_gcse_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0459/6832/6816/files/modelo_de_bandler_y_grinder.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/introduction_to_genetic_analysis_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/the_theory_of_everything_movie_online_123movies.pdf
    • https://static.usrfiles.com/ugd/d162e3_e799532033594cd8a5284caf5748c8ef.pdf
    • https://static.usrfiles.com/ugd/f1d680_c01d852474804f40b06e6ead3d81d2ca.pdf
    • https://static.usrfiles.com/ugd/cec570_947ff6121213463eb2aca08ebb3c1077.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf6d042501604a5ab710fa21e3333053.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_off00007030.bin
3405135579e6af87832f4b171645cde7ddb16aed0fbe06aab1fca0d7d87971f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7030 5328 bytes
font_01_sfnt_off00008217.bin
606e351c7b9dcfe32d7e2d3d24832f85e9f26ac3baa72bd7cefb6ffb65dd4e3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8217 15268 bytes
font_02_sfnt_off0000b127.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB127 4324 bytes