Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56e456438b05667…

MALICIOUS

PDF

57.7 KB Created: 2020-09-03 00:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8d79d55be292fc735e0c42ac3d329b SHA-1: 95b15b561981eb3988299a8fc324423cc1c1d6dd SHA-256: e56e456438b05667ad35a5b08e2c8b3d0c7a4ff14ce0e3c9055ef85136f7fafb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=android+19+dragon+ball+fighterz', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to this URL, suggesting it is the primary lure. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=android+19+dragon+ball+fighterz
    • https://static.usrfiles.com/ugd/b8c837_fcc0cc1e0227497490770403dbc9ede9.pdf
    • https://static.usrfiles.com/ugd/b8c837_574478db8c164d8684529770df75ca34.pdf
    • https://static.usrfiles.com/ugd/856cea_79fbed8e88f841b5b2e4e9c0d2893b1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1008a45593a0482ba727a4884fcec52b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d57c29cfbea74b18957df0616ed1d60c.pdf
    • https://static.usrfiles.com/ugd/c836c3_008c0ea00e4448e48222ebca6b591a22.pdf
    • https://static.usrfiles.com/ugd/93971e_b772d1f98f5c4f36a31bacda3bd7ab96.pdf
    • https://static.usrfiles.com/ugd/bae363_76f010f748264a46978286c80d44a3cb.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_dc2cd04f3f21461eb3cc038cd0b594ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc17681cc45544259d04b49a771b5b28.pdf
    • https://static.usrfiles.com/ugd/07e02c_e9ea5b9bb99b4ffa8410c358774fa360.pdf
    • https://static.usrfiles.com/ugd/d775a9_5ded141b3aac4885b0963a9333876403.pdf
    • https://static.usrfiles.com/ugd/ab63e3_6da2f8b5081c4bdd80b013b8bcaacc89.pdf
    • https://static.usrfiles.com/ugd/5af86b_ddcceb4d7eef4324b3e447b8009dcc8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cced09d6a254860bd054564cf2df276.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000bf33.bin
7d56e413f41c27ac715bd1340ab9b4ac098f87c67531be8ba9698576877eb21d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBF33 17468 bytes
font_00_sfnt_off00007d34.bin
89859cea2c4dd5a60d91c242ae75bd2c6edea97abc3e7feb910ec8be36784639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D34 3540 bytes
font_01_sfnt_off000089c7.bin
30a11f52b1f2073bf923b4b4c2351f9b6f7c60791ea61fa5eca34c64bbc7eae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C7 5376 bytes
font_02_sfnt_off00009c1a.bin
3522c92092082973c2d57cb6b64932848a00a007d3cb22c07b10267c76312206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C1A 10192 bytes

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