Malicious PDF — malware analysis report

Static analysis result for SHA-256 73932411942bae3e…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 08:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9d8072b3ba546a1b20019cb0a4ad4fd SHA-1: d1e68a49f50b9c857f87e6c8e6214a0e0b721736 SHA-256: 73932411942bae3eab95a7d106c780e5b3c9d9fccedd5ca137beeb9be231ad5a
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'jurassic world hack apk android 1'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent. The document body, though heavily obfuscated, contains a URL that is likely the primary payload delivery mechanism.

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.me/wix?keyword=jurassic+world+hack+apk+android+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/8025521364.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6299/files/1394287239.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/connect_android_phone_on_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/the_batman_superman_movie_world_s_finest.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/8689635898.pdf
    • https://static.usrfiles.com/ugd/1f5cef_7ce93598d48d4a09b85f9638b45bad50.pdf
    • https://static.usrfiles.com/ugd/565485_0faf70bb2e8046a9beb121d1044b58f2.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_3594c117eb2b4f808acd8ab0892cbedf.pdf
    • https://static.usrfiles.com/ugd/74e905_17a901656d96437b8d82fcd385814abe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/reading_phonics_worksheets_for_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/73245743921.pdf
    • https://static.usrfiles.com/ugd/8b9728_e39df4b9f20d430f972ebee6029ce1f0.pdf
    • https://static.usrfiles.com/ugd/4b7290_4ae6e1d7214d46d5b2cf8d1fedc0f9a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f27b1b26760645159a8becefc4c798b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f75cbe2ef9d4d4c8938b6be3df69f31.pdf
    • https://static.usrfiles.com/ugd/ea2f88_e4052ca879494891ab864826610f0bbf.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_off00006aa0.bin
339569eb10bd7ba7bbf40509c066c65fc6622cadbcbb62d44e8190a8a9e58264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA0 5356 bytes
font_01_sfnt_off00007cdc.bin
ec47a0fbe00da1b247e9e683f5a9db69ff0d1c9e4e6aecd419a1d4ed387f3894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDC 10504 bytes

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