Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b2cd9a390e15db…

MALICIOUS

PDF

40.4 KB Created: 2020-09-20 07:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efdce31c51f2a2ce4b949be8c544d36f SHA-1: aea03f9ea14c83a73f945cd196af45aba96d6631 SHA-256: b6b2cd9a390e15db0f445119c50cbfe64144205b2b9eaafd208c2cdbba62ec58
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body disguised as song lyrics. The ML classifier strongly flagged this PDF as malicious. The document also contains a large number of embedded links, many of which point to a link farm, suggesting a SEO poisoning or traffic generation scheme. The primary malicious URL is https://ttraff.club/wix?keyword=wishing+on+a+star+lyrics+slim+thug, which is likely used to redirect users to further 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.club/wix?keyword=wishing+on+a+star+lyrics+slim+thug
    • http://files.brooklinhorticulturalsociety.com/uploads/1/3/0/9/130969220/zisuzixisasa.pdf
    • http://rokuxep.instituteforlgbthealth.org/uploads/1/3/2/3/132302921/5633737.pdf
    • http://jigelagew.moonhavenlabradors.com/uploads/1/3/0/8/130874038/dabitaj.pdf
    • https://745ccdbc-a77b-4b34-a246-fb7dc5adcd2a.filesusr.com/ugd/f967ac_55029980c5e64c1c8ab208352da7eafa.pdf?index=true
    • https://e1ea0483-12fa-4bc3-aef1-dd565fad1a3c.filesusr.com/ugd/bcfc12_42fbfa91eb6d417088b6188bb2ff1c37.pdf?index=true
    • https://7ccdab86-2a3d-426a-9810-13e9afb206e6.filesusr.com/ugd/6c032c_06ab7017fd4f4df4a6b54e8f854dce92.pdf?index=true
    • https://5f46e444-e7eb-4f6c-902a-6d8ce6f4e1ad.filesusr.com/ugd/f80014_59c2e171e5874f9b901fc4f3279abff5.pdf?index=true
    • https://7d57feac-e26d-4f20-8742-b4b6b0984a42.filesusr.com/ugd/529ba0_fc81ceea017c4cae9eb54b94913525b5.pdf?index=true
    • https://e6ddac5c-92ea-4aa8-9aab-fa249389f76c.filesusr.com/ugd/e1c37d_6a9db0c34e1a46aa852e610923d65722.pdf?index=true
    • https://c48c0b68-9f75-43b2-9b26-4246f7906335.filesusr.com/ugd/c63bf9_838f8d6c78b744b78c214b4642a3de97.pdf?index=true
    • https://ff582a8a-1b2b-4f89-afd3-42d6f3fc334b.filesusr.com/ugd/7c3584_f5df8bc0d7c14718b846859f23a69cbf.pdf?index=true
    • 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_off00005310.bin
ff657ba6cea7e6d422326f0d1dc09bc0e39e884092101e0e7f0e48503ef84fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5310 5092 bytes
font_01_sfnt_off00006435.bin
78a620e0b7dfa4b3d9ca6117b2f34936def32574df56e23a231b1899670a43d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 10168 bytes
font_02_sfnt_off0000870c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.